[Graham]

It has been an issue of cars loosing body mount screws during the proxy, and unfortunately over 10 rounds it is quite likely without regular maintenance. 
 And of course it can be detrimental to other cars following in the lanes, so I think the request to cover mounting screws with tape or blue tack is quite valid.

I can appreciate that in the examples that are shown, that these screws hidden underneath the guide shoe are less likely to fall out and cause a problem during a run, so I would take that into consideration, but in general where that condition does not exist, then covering body screws is a mandatory requirement. In the current Touring Cars proxy many entrants did not actually comply, but instead of applying a penalty, I simply applied some covering tape or blue tack(which ever was more appropriate) myself.
And I would adopt this approach in future.