I'd like to have a go too but it would be cyanotype or Van Dyke Brown (as I have some of those mixed in my cupboard). Previous attempts have been half-arsed, varied and based on inkjet enlarged negs but something like this would get me to make a proper effort. I've also got a few 4x5 negs now to use.
So, if a 4x5 Cyanotype or VBD from a rank beginer can be slotted in to the mix, I'm in. If it can't, then no drama... I have RC postcards to print