Best mods? Getting my SBE, Urika and Nova fitted.
SBE: Replaced all the springs with heavier weight to avoid the click. (Worst mod was getting it camoed. It didn't last a season and I able to rub off some of it with my thumb).
Urika: Replaced the lifter with a B_80 bent version, put in some new parts from a 390, replaced springs in the stinger/bolt. Liked the stock (it's a hunting version), so swapped out the barrels to Optima sporting barrel. Then got some C-N-C chokes. Has 2 pads that are set in with an allen wrench. One shorty for hunting and a longer version for sporting clays. Also have a heavy weight on the end of the forearm. This gun when I'm shooting a lot feels like it's part of me.
Nova: What's left to mod?
All this for a bowl of borscht.