1 - Prometheus was used for pantograph development so virtually any type of pantogrpah could be fitted.

2 - Prometheus was 'Laboratory 6' of the Research and Development Division. Test Car 6 was a totally different Mark 2 vehicle operated by the DM&EE.

3 - I appreciate that your project is well under way but cannot help wondering why you are using a BCK for the basis rather than a BSK as the real one did.

Edit - I have now seen the other part of your blog and see that you are using a BSK. Sorry for going off at half cock. I take it you are aware of the observation windows at the inboard end of the pantograph well?

Yep, going to cut the windows out when I've marked everything out! Didn't know it was Lab 6 some one made it as Test Coach 6, now I know