Heres my specced car with the "low" perspex fly screens and "tall" fly screen. I actually don't mind the tall one. Looking at the configurator pictures, it looks like they both fit using the rail locks. So hopefully I'll be able to add the low ones to my order, cancel the the tall one (as its not ready anyway). And then order the tall screen at a later date and have both options available to me.
If anyone is wondering, the colour of my car is meant to be Willow Green. The colour isn't available on the configurator, I made that colour myself using the colour selector on the right hand side of the screen. It's not 100% what Willow Green looks like, but it's as close as I could make it.
Nice colour combination - I mocked up the same configuration but with silver cowl and black wheels - but only to match my M3W...

PS: given Morgan's track record on accessory availability, I would be tempted to keep the order for the tall screen "on the book" to give them some kind of commitment to deliver. I would not be surprised if the final version of the screen looks a bit different. Future versions might also be interesting - e.g. adding screen framing, or the option of a fold down Brooklands screen...)