I'm going to sound weak for saying this but, the brake pedal on my Logitech G920 is REALLY hard to press down fully in a quick way, which makes heel toeing impossible,
Brake Pedal Tuning Kit for Logitech G25/G27/G29/G920/G923 Mod Sim Racing Drifting Upgrade - Etsy
Logitech Brake Pedal Mod G29/G920 remove rubber/Romanian language - YouTube
TrueBrake - V2.2 GT Edition - Brake Pedal Mod for Logitech G29 G920 G923 | eBay