I've re-sited one of the PV panels out of the way and scraped off worst of stubborn adhesive

they need an aperture of 500x700mm complete with small radius in each corner

Circular hole is where Mushroom vent had been fitted previously

I've included the existing circular hole into my cut-out to save me trying to clean off the old sealant

All marked out in felt tip, so that's sort of permanent now isn't it

Here on bench the exterior half of Heki (upside down) showing the slots where the 15 fixing kits will slot upwards into

here a single fixing is shown how it locates, it has a single screw into plastic & then Two upwards into ceiling/Batten in roof


These are the Two different length kits, I ordered original for 35mm thickness roof, but thinking then I'd settle skylight onto band of double sided tape plus Silkaflex, I decided instead to order kit with longer prongs to make sure they would fix properly

these are the sprung clips that will hold inner ceiling trim complete with blind and mosquito net


Tomorrow I expect to get on and jigsaw out the roof panel, try the skylight in place for fit,
prepare and fit a batten inside the roof first scraping out insulation to make room