Just goes to show a little knowledge is a dangerous thing. So my thought is that if I have to dismantle the roof to ascertain the exact problem it might be wise to use all three kits to obviate the need to do it again. Is the tab issue the one the Australian gentleman, Howard, I think, recommends removing so the rear glass will stay down and stationary?
Before I go much further I believe I will reconnect the system to see what actually happens unless you recommend against it.
Another new adventure!
Thanks once more.