412 mini project

[Wellington]

I have recently bought a 412 that's a decent runner but needs a bit of attention to details.

It's a series 1 so has the frameless windows.

My question is how far do I chase a good seal between the windows and the targa top?

At the moment the seals are more or less shot. I know the frameless windows were never exactly fantastic. The automatic window drop has been disables/doesn't work. How far do I go looking for a good seal between the roof and window? it is something that can be got to a decent level or is it a question of getting it vaguely water tight and accepting it is what it is?

thanks in advance