First time shooting/dev Chrome. OMG Ques pls?

I've never shot chrome but I finally gave it a try purchasing some Velvia 50. Understanding that exposure needs to be tight I kept this in mind and waited until I have at least 2 120 rolls and 3 35mm rolls as not to waste expensive chem's in the jobo Drum and it's a bit time consuming mixing 8 chems.

Holy Cow!!! I simply cannot believe this film and I'm blown away.

Now I have some old kodak projectors that came in a bulk purchase so I'll be getting the dust off of them once I mount.

Questions please?

I do not yet have my screen. I'm in the middle of waiting for my movie screen paint from B&H so, can I project on any white service in the mean time? How about white seamless?

Mounting? I have purchase some Gebe mounts but not the mounting kit. Is the kit make life better? How does one project 120 mounts please?
Thank you.

There are projectors for 6x6 transparencies, the most common ones are (were) made by Rollei. Another choice for 120, but not really a choice for what you've already shot, is the "super slide" format which is 4x4 cm. These fit in standard projectors. I don't know if 120 (6x6) or super slide mounts are made anymore, I doubt it.

I'm sure the Gepe mounting kit would make things easer, but I never found the mounts all that difficult to work with without one.

I've projected my slides onto a white wall far more often than onto a real screen. Works fine. Actually, some of the glass bead screens detract because they give the image a kind of grainy effect, IMHO.

Thank you Kurt.

I should have mentioned, I shot the 120 as 6x7......

Congrats!! I did my first Echromes back in the mid-70's when Kodak brought out their first E-4 DIY kit. Its still magic to me!! I dont think I'll ever stop working in the darkroom.
Rick

THank you Rick.

It really has me swooning... Now I'm leaning about icc profiles to get a much better scan. I think this is a bit of trouble considering the price of the rolls and the E6 Baths..... Presently I'm using the Kokak 6 bath, any other suggestions to keep quality while cutting a bit of the cost. My E6 Bath is about $60 for 3L and I have to drive into the NYC to get it as BH Photo will no longer ship chems.