The multi-tool rotates 3.2°. the Biax has a linear stroke adjustable from 0-20mm. So not really convertable.
There are two reasons for the price of Biax scrapers. Both apply to the new product and the latter apply to the second hand market.
- Swiss.
- Small market with high demand.
I'm afraid I off mine via EBay before the world went mad £60 for a BL-10.
I'll probably be finished with it in two or three years time after which I'll pass it along so another poor sod can make his toys better than new.
Edit to add:-
The variable centre swash plate drive that the Biax scrapers use is a fairly simple thing to make.
Edited By Mark Rand on 10/01/2020 00:51:14