I have welded subframe connectors in my convertible, none in my dad's. Both cars have all 4 cocktail shakers and both have X-brace. His has brand new poly body mounts, mine are worn out rubber cushions.
His car is squeak free and solid, mine squeaks and squirms when climbing curbs.
So your saying the poly mounts made a bigger difference then the SF connectors???
I have the RARE belly brace on the wish list. I like it better then the hotchkis one. I do plan on getting the hotchkis subfram connectors down the road. If you remember the thread that was here a little while back on the subject I looked at them all and I liked the hotchkis ones the best.