Door Mirrors - Alternatives

[IBDAET]

I've just done Le Mans in my car with a screen and doors on and it was damn hot. I like having the screen and half hood as it gives decent weather protection if it rains (which it also did - heavily a couple of times) but what I want to do when its sunny is take off the doors and run with just the screen on. My driving style dictates mirrors are essential - the rear view mirror is near useless with the X in the centre of the Double D roadsport cage, exacerbated when touring so having a boot bag and hood bag on the back also.

I have an aeroscreen which is a scuttle swap with some SPA Design carbon mirrors and I'm eager to take these off and mount them on the normal windscreen frame as a better solution than the caravan mirrors currently on the doors. This leaves the mirrors on the car when the doors are removed.

Does anyone have any experience of fitting the mirrors to the wingscreen stanchions - how they impeed door opening (especially with the cage) did you drill the stanchions or make/buy some brackets?

Any other solutions I've overlooked?

[IBDAET]

I have pinged Mr Fingers. Thanks.