I have 62G Zealios mounted in GH60 configured in HHKB layout. I have them PCB mounted without any plate, in a plastic case, with Gateron PBT blank keyboards (enjoy PBT set) and really like the way that keyboard feels. It's light to carry, light to type, nice sounding with bottom out feel a bit softer than with a pate. This combination is very nice alternative to a real HHKB. I would have very hard time choosing between the two really 
I think I should make a video comparing this GH60 to a HHKB as those keyboards are so similar, and so different at the same time, while both being basically top class.
Hej Czarek!:)
Sounds good to me - I mean I'm happy to see that you compare Zealios to topre. This is kinda my plan - I've read many times that Zealios 65-67g are like topre, where tactile bump is very similar to topre.
I'm in constant search of topre like switch with heavier feel. Ordered some topre 55g to see how those feel like, but wouldn't mind some keyboard modding myself, so this is why I'm trying to think what could I do with Zealios:)
I would prefer to avoid desoldering - I heard its a pain to do it, but wouldn't mind good DIY set to solder them.
Awaiting ISO versions of Varmilo 68 - should come out any day now. I hope they will make DIY set of those too.