You can fit the hours and minutes of an NH35 hands set perfectly fine to an ETA, will sit nicely firm. The other way around can sooner give snugness problems (but is also not impossible) only the seconds hand needs to go from .20 to .25mm. This can be done by gently hand twisting a .25mm tungsten drill bit in the hole, but not 100% through. The last bit best take a 0.20mm bit and very gently twist it whilst holding very slight tension to the side, to ream the hole slightly. This should provide a snug fit.You absolutely need to share if you find any ETA swords. Rhory and I both have struck out in that front.