Hmm, I used a ruler to (roughly) measure a tall Kinesis key, as well as a WASD R4 key. The height difference is roughly 2mm. The DCS r5 seems to be about one mm taller than the R4, but also about 1mm shorter than the Kinesis key. 1mm is roughly 0.04 inches BTW. So the SP keys should be a little better than the WASD R4 and might be good enough.
Meanwhile I'll go check out if I still have the fine sandpaper I mentioned.
Update 1: IN, for how long have you had the pic of the Mothership in your article? For some reason I never saw that before.
Update 2: I do have some P 800 sandpaper, which is quite fine, but did leave some faint marks, and a finer one for polishing, which got more or less (rather less) rid of the marks. Now I get that sandpapering isn't exciting, quite a bit of work for a single key, and that was only one with
Ctrl on it.
Update 3: Ugh I need coarser sandpaper, this
Option Alt legend takes forever to get off.