wasn't tricky AT ALL Andy.
You paint up to the edge of the vinyl waste with the LM, then when you lift the vinyl, and pull towards the transition (to LM), it lifts the LM in a single piece - super easy.
Ignore the trim line tape. I placed that on the outside as a cutting aid for the eye, and that really work too - gave me some nice parallel lines. I've tried it on the inside before, mixed with LM and the results weren't good - the LM got under the tape at the folds in the shell.
I'll post up a step by step in my thread later - thought it was worth a mention in here though as this is where all the vinyl talk is at

, and it gives you some deserved credit too.