Joe a word of warning about montex vinyl masks - they are far too sticky and will leave horrible staining on your canopies Plus they do not curve over the canopy pieces well either.
I used them on my Ju88P-1 and learnt a very hard lesson.
What can be done is get a glass kitchen chopping board.
put a large strip of Tamiya yellow masking tape onto the board.
Use your montex masks as a template over the Tamiya mask tape.
use a good straight metal ruler as a cutting guide, and a new blade.
You will thank me later - trust me on this!
Bonus is you have the montex masks for any other Ju88 you want to do, just restick them back onto the sheet after you cut out replacement ones
I have used this method on my He111 H4/6 , and my Do17Z Classic Airframes build
Scroll down about halfway
https://www.modelersalliance.com/forum/wesendorf-field/116477-classic-airframes-148-do17z--finished-?limit=8&start=32
https://www.modelersalliance.com/forum/wesendorf-field/116477-classic-airframes-148-do17z--finished-?limit=8&start=80
result on the He111
considering the mess those montex masks left on the Ju I think I was lucky to get them looking half decent, Future was brushed over the glased panels as well.
Cheers,
Phil