Dick,
"Schwitters gearbox" can mean a lot of different things.
Steve makes a close ratio synchro box with stock 1st.
He makes a close ratio synchro box with a 1.99 1st.
These boxes have far superior ratios (for pure racing)
than the original factory close ratios.
Steve also converts Alfa boxes to Hewland Mk 5 internals
with either a fixed 1:1 4th, fixed 1:1 5th, or an all gear
ratios variable like I run. These are non-synchro dog
engagement boxes.
Not sure what he uses for a business phone however if you
will leave me your contact info at
curtis@thiscrazygarage.com
I would be happy to have him contact you, or give you his
phone number.
I do know he does not have a web site.