Bent plate with DSA isn’t really recommended. Notice that IBM keycaps for a bent plate have a fairly steep tilt to them, so there’s a step between rows. To get the same effect you need to use something like all uniform ZXCV row keycaps from a cylindrical keycap set.
Something like:
If you put DSA caps on there instead, you’ll end up needing to move your hand more to press the top 3 rows, because if you just try to press them without moving your hand your finger will bump into the key in front. (DSA on a flat keyboard has the same issue: also not recommended.)
Here’s a picture of DSA on a flat keyboard, in case it helps with that explanation:
To be honest though, you’re going to get better results (from a typing comfort perspective) with a flat plate and standard cylindrical keycaps. IBM’s curved plate + uniform keycaps design was done to save costs, not to improve typing comfort. If it’s a 60% board, there really isn’t any height advantage of DSA.
If your goal is as slim as possible, flat plate + Cherry profile keycaps is your best bet IMO. And then focus on getting the bottom of the keyboard slimmer. For instance, you can partly bend or clip the switch leads, hand wire the board together, and have the case bottom kissing the little plastic nubs on the bottom of your switches.
On the other hand, if you think a bent plate would look cool, or be fun to build, or whatever, then go for it!
