It's been easy to mount my th8a on my playseat challenge: two 22mm clamps and a 30 mm wide aluminium bar : r/simracing
Thrustmaster TH8A-Shifter Mount On Playseat Challenge - YouTube
L/R Bracket Handbrake Stand for Playseat Challenger Seat Th8a Shifter Gear Lever | eBay
Playseat Challenge and Thrustmaster T300RS Question - Page 11
For Thrustmaster TH8A Playseat Challenge Right/Left Hand Shifter Adapter Bracket | eBay
T3PA PRO and Playseat Challenge - Page 2
My (surprisingly stable) DIY solution for mounting the TH8A shifter to a Playseat Challenge. Do you think it will wear out the belt too much over time? : r/simracing