i'm also searching for a nice interchangeable long-blade solution.
i like that wiha centrofix handle. you can put long blades in there, and there's virtually zero wobble.
but if you didn't already buy the centrofix, i'd wait a bit (Q2 2021 i've heard) for this to come out:
pb swiss insider 3 with rolgear "ratcheting" (smooth roller-bearing) mechanism and the wiha centrofix holder. with hex bolster.
but since i already have the old wiha centrofix handle... next time pb swiss goes on sale here, i'm buying some long E6 blades (E6L) and making a set out of it. i have this combo pictured in this thread:
https://www.garagejournal.com/forum/showthread.php?t=468842
there are some other interesting options in that thread including the felo smart set:
i forgot to ask back then when i made that thread, but does anyone know how the blade wobble is on felo smart set?
looks pretty cool. hard to say what i'd like more overall between that and my wiha centrofix with pbswiss E6L blades, but since i already own the centrofix, i think that's what i'm going with for now.
i have the pb insider 3 (6510 R-30) and have tried it with E6 bits (power bits). there is some wobble, but it's not too bad unless it is a long bit. i would say that 2" bit is usable.
apologies for replying to a 1+year old post...

oops i realized i can't post links. but you can search amazon.de for baolida schraubendreher


























































