Thanks Broad / House. Yes the car is quicker when it all works, most of the others are very well developed though so I'm at a disadvantage with such a new build. When it all comes together I'm sure it will finish higher up.
RE the shifter the main issue is the Compbrake "solid" mounts, there is far too much movement in them so the engine isn't settled when I'm shifting and it's popping out as I lift off. I'm either going to solid mount it (properly) or build a 4th mount. It won't be a gearbox dog bone at the front though, more like a 2-piece removable stabiliser higher up and through the bulkhead to the dash bar.
Only one mod at a time though, if I can keep the rod style shifter after that I will, if not it will be a cable shift of some description.
My last car was an XE on solid metal mounts and it shifted perfectly so I'm leaning towards going that route first.