I've seen it done (stevenbolts style), there are pics kicking around somwhere on the site.
IMO any adapter plate should have smaller port holes than a standard head, to be enlarged (matched) to you heads ports.
This is the risk people take when they don't get parts properly drawn up and cnc machined. The actual plate minus the cut outs doesn't look too bad, its been laser cut but like said could do with having the ports smaller, and maybe the faces cleaned up.
In Janos defence, his inlet adapter is very cheap, a decent one from ferriday will cost upwards of £120 i believe. I drew one up to be made but in the end it was just cheaper and easier to fit an efi head, a one off laser cut then machined would have been 70-90ish and my head was £50. Job Jobbed.
Rob,