Very many thanks for your comments, chaps, I guess that the crucial aspect is the cure time and the supplied 2 Pack doesn't indicate the cure time. However I would think that the manufactures would take that into consideration so it is probably quite generous.
The mouldings are, actually, very accurate so a "first time" fit should be possible without too much time wasting "fiddling".
OK on the roughing up and the way to secure the parts while drying and inverting the whole thing makes sense .
I had wondered about cleaning the residue which "tt" mentions, the instructions say that excess epoxy can be wiped away with a damp cloth provided it is done immediately but my experience of epoxy brings that into question, what do you think??
Thanks to your support, I am happier about using the products supplied with the kit so thank you for helping out.
Regards
Barrie.