Too late now, but at least you bought from a great supplier.
I love both my SS and HydroKinetic, depending on the fabric at the time.
Never, ever, had wrist or arms problems with either of these two.
I think I do prefer the HydroKinetic though over the
Sapphire Scientific.
I think I have Richards earlier collection as well.
I love my upholstery tools, the ones I didn't like, I got rid of.
Like the
DriMaster 11
I also have some stainless steel internal jet tools that
MAY BE PMF, or a clone, as well as a cheap, small plastic tool with external jet that cops a fair amount of use.
They make me a lot of money, usually paid for in the first, if not, 2nd job, then it's all cream.
So if I'm happy with the tool, purchase price is a minor discomfort that soon mellows when the check is cashed.