After getting the Pre War tin grip Junior I got off Tom (Sevorg), I found that I had a later frame and some white grips, thanks to Phil Bingham. As usual with these things (BIG SIGH), you think that you have most of a pistol and then find bits and pieces are worn so you go from "Almost having a pistol" to "needing lots of bits for a pistol!. I was given a bent Junior barrel off here by Rickenbacker and Chris Hough sent me a piston. I made up a leather piston washer and sorted a screw as the threads had gone on the piston. (I re tapped it). An old breech seal that was ok was fitted and I had to buy a second hand sear and the rearsight and screw. I found the linkage had one hole that was too big but found I had a spare linkage. Plated screws were used to hold the grips on, which were located by a bit of alloy round bar that another bbs-er had turned down for me.
Anyhow---the cocking link was too tight and required a little filing to sort it but the gun was still hard to cock. (Why are they so hard to cock compared to later/bigger pistols?) I swapped the mainspring with a thinner one out of another Junior and it is better.
It is back together and the sight is ok for bottle caps at 7 1/2 yards.
So--another one bites the dust, thanks to all the help from the gentlemen of this section.
Was it worth the trouble/ cost and time? Probably not, but at least it is done now.
I've still got a table load of dead Relum underlever pistols though