Hello Richard. Great to have another fan of Euro heroes with us. The more the merrier.
First, uploading, and we need to keep in mind that L'Asso di Picche, for instance, is a Hugo Pratt book and there's no way we'd be able to host the great mans work on CB+. I hesitate to mention this as you probably know more about it than me and that is that L'asso di Picche has been reprinted in Italy on tpb format in 3 volumes by Gruppo Editoriale La Vecchia and there is the Casterman book as well, in French (L'As de Pique). But if you're looking for the originals, the reprints will probably pale into insignificance.
But I am a big fan of Fantax - you'll see from the above exchanges what I have. Also, there are reasonably recent, perhaps current, reprints in France. So, that sort of counts it out. Arana Verde (Green Spider) is a new one on me but I assume you've had it listed on International Heroes - I'll have a look later on.
Now, Maskar has always intrigued me, being a sort of watered down version of Fantax and a few years ago I bought on Ebay a small selection of striscie, the thick album issues, from 1964-5. They weren't that expensive and I'm looking at I Mostri Verde as I write this. Unfortunately I have no spares to trade. Sorry.
There is so much to get to from your post but a couple of things that interest me and we might well intersect on them, are the Spanish (and French) reprints of British heroes - Ojo Magico; The Spider (also called, Blackman, Flierman etc.); Steel Claw (Main d'Acier); King Cobra, etc. And, Dutch landscape newspaper strip reprints in text strip format e.g Aram; Kapitein Rob; Eric de Noorman.
( I have found in the Netherlands, versions of Italian comics e.g. Mister-X (not to be confused with the Italian hero with the atomic belt)
I'm starting to think about what to take to the next Glasgow mart but as it's some weeks away, I'll end up leaving it to the last minute as usual. But I have looked out a couple of doublers of Eric de Noorman to display. As they are the bigger Belgian versions, they might not interest you.
Back to uploads and lots of Spanish original comics are perfectly acceptable, just watch out for DC Thomson reprints and Fleetway reprints from the '60's. French and Italian comics I'd suggest giving us some info. on them before you start scanning - it's a bit of a minefield but, as with Spanish titles, lots of French landscape titles and their publishers are so forgotten and neglected that CB+ might be able to host them.
By the way, I have some contributions also on International Heroes.
Excuse the ramble, please and keep chatting.