-Own two XB12STT's
-70 years old
-29-Inch inseam
-Plan on riding another decade or two
-Not a racer and no longer very aggressive

Have no issues with seat height now but would like to lower one of the bikes a little anticipating possible future needs.

--How practical is it to install an SCG Shock Assembly on an STT?
--Will handling be greatly affected?
--If needed can shorter springs be installed in the stock TT's forks?

Looking forward to your responses. After recovering from minor surgery later this month, plan on burning up the roads. Except for this possible upgrade all three bikes are ready to roll.