Excellent! Thank you for that.
I have a 2006 convertible that I would like to carry bikes on. Last summer I did think that I had found a boot-mounted system that would allow me to raise and lower the roof without taking off the bikes and rack - but when I tried it out - it was clearly not going to work. So I think this is now the only option which will allow me to still open the roof with the bikes attached.
Just out of interest, what brand bike rack do you have? I have great confidence in Thule products - I used their kit years ago when I was windsurfing, and never had anything break or let me down.