This is not exactly a tip , but there seems to be no forum for home made tools ? All of us would like to have every tool that comes down the Pike , I think? However some of the tools out there are pretty pricey-- NSWL makes a great riveter , but it's over 165.00 $ today & is not something many of us use all that often. Here is one I built out of cheap ? stuff & odds & ends. I think most anyone of you halfway compenent ( you ALL ARE) modelers could easily put something similar together if you wanted. Take a look & I'll try to explain some of the components -- at least those I can remember! I would guess that the whole machine cost less than 20.00$ because most of it came from a metal salvage yard, ALL the aluminum did AND in THIS case the precision ball bearig drawer slide that is one of the main ingredients. They had some U.S. surplus electronic cabinets that were being scrapped & I bought about 20 sets of slides for a buck a set! However. even having to buy one new would most likely add only about 20.00 or so to the cost. The Rest is Hardware store stuff that is nickel & dime-- the gears are from an R.C car & only 3-4 bucks. The drive screw is a 1/4 & 20 threaded rod, giving a .050 advance per revolution to control spacing accurately. It is turned down on the ends & fitted into drilled out coupeling nuts with a piece of brass tubing soldered on the rod to act as a stop to maintain the screws position & gear mesh, the rod itself roates in the drilled out nut as a bearing. The rivet punch is a piece of 3/8th cold roll fitted thru some brass plumbing fitting, I think a pipe nipple? The retractor spring & the two big upright support bolts came from home depot! A couple of grooves in the cold roll for E clips to retain it, the Male die made of drill rod, the female of cold roll, both removable. The Bed is drilled & tapped & scribed for alignment of the parts & has the small 1/4 inch hold down clamps. I would suggest adding a lock nut ( wing nut if one small enough can be found) to the screw on the knob to push to form the rivet, if it turns you end up with different sized rivets . I am at the limit of pictures on this post ,I'll put up a few more. I do hope this will help someone .