i bought some of these a while back, i'm not really a fan. swaped them back out after about 10 minutes of typing.
they lack the "spring back" of the stock hhkb domes. i bought the 55g. almost mushier than stock.
but that being said, i had cut the sheets, and modified them to work inside the hhkb.
i'm sure they are great on the board they are intended for.
First of all, sorry for necroing this old thread.
This is a total misinformation. Either you misaligned the springs, or didn't cut the silicone sheet correctly.
I purchased two 55g silicone sheets. They are very slippery, totally not recommended for the inexperienced.
I had to reinstall and reopened my hhkb 5x, also screws and unscrews a couple more before all the keys feel uniform and tactile.
The "spring back" is very fast and powerful, about two or three times the power of the stock hhkb domes (it's SILICONE for christ's sake!) but definitely not as sharp and powerful as them BKE domes.
Installing the silicone sheet on RF87u took me 2x tries after cutting a new one, no real difficulties here. I'm surprised at how easy it is, perhaps due to its heavy plate.
Installing the silicone sheet on Novatouch, however, is a nightmare. First, the big holes between Function row and alphas. I have to cut it again since I reused the sheet from the previous RF87u. Next is the really difficult part. Novatouch pcb doesn't have holes to align with / for inserting the front case, unlike hhkb and RF. Since the silicone sheet itself is very slippery, a little 'nudge' can ruin the sheet alignment. Not to mention the amount of black and silver pcb screws, unscrewing and reinstalling is a real pain in the ***. Took me almost 20x before the 'perfect' uniformity, and I ended up spending all night reopening and reinstalling it.
The fun part is, while the stock lubed Nova 45g dome feels too weak for SA, this silicone 55g dome lifts those SA keycaps like a champ. The spring back is very satisfying (especially the spacebar), I highly recommend it for SA keycaps.