I had a flashback when I saw the work you were going though to get the track correct. I used the same track on my Grant but I didn't grind off the chevrons and add pads. I'm got lazy on that. Before the HL Sherman track was available I went through a labor intensive modification of Tamiya Sherman HVSS track to make VVSS track with outside guide horns for my Stuart. What a pain that was!
I really appreciate what you are doing on your M3, your skill and attention to detail is a treat for me to see. Thanks to you, I just may have to modify the track on my M3 to be more authentic. Your British track pad design blows me away ---- WOW! You have no idea how much respect I have for your efforts on this project.
rex