OP is long time plastic modeller with years of "unfortunate reflexes" with Dremel and plastic (which 4506 grips undoubtedly are). I would of course, for the knee jerkers, take the grips off first and I have several sets of spares to make mistakes with; I assume there are other modellers/gun enthusiasts out there who share a similar conviction that they are quite capable of making necessary changes to plastic; Ok, OK, if it makes you feel better, I can do it with a file or sandpaper I think; just wondered if anyone else had tried it. Keep Calm and reload. For the one who observed I should just get a 4506 already; I OWN SEVERAL. I love them very much, but this could be an improvement apparently not appreciated at the factory (they never had problems with "not invented here" at S&W, did they)? Many have lamented the fact a 6/745 (have 1 each of those too) had a kinder grip heel profile than the 4506 and that it was closer to a 39 in shape; I noticed it too and want to go there. I am quite sure I specifically referred to modifying the GRIP and not the frame (If you know the gun you know you could do this) and have done several reductions of Hogue grips to slenderize them. Thanks for the non input. Geez...
For those of you who provided sane input (you know who you are) Thank you very much. I have only been able to obtain 1 pair of 1076 grips, and agree with you very much its' the way to go.
Really trying to puzzle out ways to make the heel of the grip on a 457/16, 4513 a little more comfortable, and preserving some backstrap behind the mag when modifying stock 4516 grips to fit CS-45 or 4513; thought it was a simpler thing to do it for the 4506 and started asking questions there.
For those who wonder why I didn't get what I wanted or trade for another in the first place; CS-45 was only ever issued with Hogues which are huge and sticky rubber and defeat the purpose of a hide out gun. Enthusiasts for this type have been modifying the grips for years to get what they want and this usually involves modifying a 4516 plastic 1 pc grip to get there. 4513 is similar set up; 4513s in 4516 grip configuration are thin on the ground and certainly more outrageously expensive than modifying a set of grips. I am just proposing a mod I have never seen before; I am quite familiar with the grip mods I discussed above for the CS-45, but want better for my 4506 as well; the one set of 1076 grips I have been able to get (are there any still available from the factory?) are mounted on my CQB. (I own 2). So long and thanks for all the fish...