RV man the site for ati is
http://www.atimanufacturing.co.uk/.
I would check other posts, there seems to have been some "Issues " with dealing direct with them. Yes, I built their P-38 and it flew well. These are a kind of "Quick Build Kits". Meaning lots of plastic, but the control surfaces were finished and sheeted.
Yes, I agree that the instructions are not for the first or second builder.
Good Luck,
Must be nice to have all the cold weather for building time........OUCH!!!
Twinman