I would say yes if you want to make money doing mods and do ALOT of them but for my lathe and a decent chuck it still only costs maybe $300 and as evidenced by my work you can get great results on recesses. Now I already had the lathe back when I was really into wood turning so I wouldve gotten a Taig if I didnt have this already. But honestly with practice and a good set up you can get great results with a drill.
Now obviously the yoyo would be flipped around to do a recess but i didnt feel like taking the caps off.
The drill is clamped to the table and the block of wood is the same height as the center of the yoyo and is also clamped to the table.
I would recommend a corded drill that spins both ways and has a trigger lock so you dont have to hold the trigger down
Also get a bag or two of extra nuts and bolts for duncan yoyos at the hardware store (just bring your fhz along, see what nut fits and get them plus the same type of bolt) it will only cost a couple dollars but you can clamp down on an extra axle without worrying about the threads rather than using the axle the yoyo came with.