[Nonfractal]

I can't tell if you have the axle fitted to the guide holder, or not. When I fit HRS chassis to saloon cars, I find I need to use one of the axle supports over the guide "A" frame, to shorten the distance between guide and front axle. Here's one fitted to an old Scalextric 6R4.

Got it! 
For the TR7, The axle does go through the guide holder.
I didn't realise that the spare axle holder could go ahead of the guide frame axle position, not just behind it.
However, the hrs2 "screw kit" only comes with one pair of axle/guide bolts so I'd have had to order 2 screw kits to make this work.
Thanks
Alan