I hear what you're saying and essentially said this right off the bat as for you there's no stronger proof than the actual results that you actually got. Hence I was trying to examine it from a more logical-broader perspective - as like I said I really do just think it's more a case of it being a superior fit for your specific needs, than it actually being a superior razor. And I hope you know I mean this with absolutely zero negativity towards either you or the razor.Each of your theories is sound, they make complete sense and yet the reality is that the plastic razors can give a superb shave. I argued with @Pjotr but the proof - in my case - is in the pudding.

Hmmmmm call me dubious but and please understand I'm talking about in general not just solely for yourself - but if Merkur's design of the #45 was so different, which I'll take your work for having not seen one first hand. And Merkur tested it with several folks, which I'd say is a pretty safe assumption - surely if they found it a superior design to their current metal head geometry they'd have used it? I mean thats essentially a given.1. geometry - the Merkur #45 bends the blade like no other razor - well except a rare few like the Progress and the Razorock Slants. It is quite extreme. This seems to help with angles and the approach might account for the close shave. Likewise the geometry of the Souplex is quite aggressive. There is quite a gap between the blade and the bottom plate. I have read elsewhere this morning that folks find the shave from the Double Six aggressive and rough. Well I certainly agree with the former and maybe the sharpness of the Feather is cloaking the latter.
So I really don't think it can be a superior geometry - but again it's 100% plausible and likely that it's one that works very well for yourself and PJ.
My point was that with the bakelite (which I believe is actually not bakelite but plastic but I know it's just a name) the user has to apply the pressure as I cannot imagine you can hold it by the tip of the handle and it's weight alone is enough to with gravity's aid overcome the friction/resistance and cut through the hair in a stroke. So this is contrary to the one of the core starting principles with using a safety razor, that being to let the razor's weight do all the work (or atleast as much of it as possible).2. weight - yes the bakelite are far lighter than any metal razors. Please don't think this permits pressure. It certainly invites it and in some places you can get away with it, but it's not the norm. However, I feel a greater degree of control of pressure with the lighter plastics - this is especially the case for the ATG passes where the weight of metal razors diminishes. Actually as I think out loud, yes the plastics do offer more control with the ATG pass. This might help reduce irritation.
More control? You could be right however I'm not sure that the weight of many razors is such that the average user would lose any real weight over them due to it - e.g obviously if taken to an extreme and you had a 1kg razor you'd lose a massive amount of control and it'd be a huge factor but there'd be a point at which the average user would find less weight to have no effect on their control.
Makes you think about the difference in material - esp. between metals. For example, the Standard is a damn fine razor, so smooth and so efficient. Yet it's aluminium chassis finds it half the weight of the Weber. Same with the aluminium of some slants such as the Razorrock or the iKon #102. So heavier doesn't seem to equate with better. Obvious the fit, finish and shave of the aluminium Standard is superior to many heavier zumak DEs. BY extension the same might be said for the difference between heavier zumak and lightweight plastic. I'd contend many of us would prefer a plastic Merkur #45 over a mostly-metal Micro-Touch One.

Ah mate comparing completely different razors made of completely different materials and drawing anything from it is the veritable definition of comparing apples with oranges and I didn't for one second contend that heavier is better. That'd have been a massively simplistic comment that wouldn't pass even the most elementary of checks.
I didn't mean to turn this into a overly complex or silly discussion. First, I was happy you'd gotten such good shaves - haha I should be so lucky as to find my dream razor and it happens to be so cost effective.
But I was just trying to logically establish what, if any advantages plastic razors might have which could explain this and possibly mean it's more than just them being a great match for you and PJ. Nothing more or less. Anyway glad you're getting great shaves and appreciate the feedback as it's very interesting.
