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,
Fix Flickering Logitech Pedals not working, braking by itself (G25 G27 G29 G920 G923) - YouTube
Extreme Sim Racing Inverted Pedals Kit Upgrade for Logitech G25, G27, G29, G920 and G923 add-on - Brake Pedals with More Pressure - Logitech Pedals not included - Walmart.com
How to Fix Logitech G29/G920 Brake - YouTube
Are the Logitech Pedals Really that bad? (G29 & G920) — Reviews
TrueBrake V2.2 - GT Edition (Inc. All spring options) - Brake Pedal Mod for Logitech G25/G27/G29/G920/G923 - AXC Sim - Sim Racing Products
Authorised Vendor - TrueBrake Brake Pedal Mod for Logitech G27/G29/G920 | RaceDepartment