Been a while since I posted on here - apologies for that - but I have now set up my own website for my multi-boot builds (along with 'how-to' guides etc. too). Hopefully its cool to post a link here (its all non-profit of course!), so here you go:
Its a fairly basic site for now until I get to grips with building a website (its my first!), but on there you will find the following builds:
RetroPie 3.6 & OpenELEC 6.0.3
RetroPie 3.6 & OSMC
RetroPie 3.6 & RasPLEX
RetroPie 3.6 & OpenELEC 6.0.3 & Raspbian 'Jessie'
...and more, so feel free to have a look.
All the best,