[sc_rufctr]

When new the 915 was often described as a good gearbox.
However poor maintenance, time and mileage have all had an effect on how these gearboxes shift today.

I agree with you that a shorter shifter would only make the problems of this gearbox more noticeable.
I run a Rennshift in my car but I have it adjusted to 20% reduction rather than the 33% reduction and using SWEPCO oil.

My recently refreshed (not rebuilt) gearbox shifts superbly.

The ability to choose the amount of reduction was a major factor in choosing the Rennshift over the WEVO and others.

Another thing to think about...
The legendary 2.7 RS has a 915 gearbox and these cars are praised for the way the drive and handle.