Nothing wrong with Tapco, haha.
Before I lost my SKS in a boating accident some years ago, at a place I can't recall, I did the Tapco stock thing to it as well as the mags, and I found a few things.
1) All aftermarket stocks I have seen lack a proper lug for the receiver. So I installed one by marking the area on the stock the lug would go, drilled some holes, threaded the stock in place, and cut to flush, then bedded it down. The accuracy was the same or slightly better than the original. Could still hit a 12 x 16 gong at 300m. Just what it was designed to do.
2) The Spectre parts are well made, but they require significant mods to the Tapco mags to work properly. You'll need big hands to properly manipulate the mag release and I found it wasn't all that faster than the Tapco 'pull' type release I had before. Only with the Spectre setup you didn't have to drop the mags. I got both the block and the mag release, but only wound up using the latter. My stock lug is epoxied in place.