• A size 400 or 380 motor will work just as well as size 330.
• The motor mount can be assembled on your own, but it's easier to just get it from www.hovercraftmodels.com.
• The packing foam (not peanuts!) you find in packages will work just as well as builder's foam, if you cut it.
• Make sure you cut your skirt exactly eight inches wide. If it is uneven, you will not be a happy camper.
• If you can't find plastic bolts, use Gorilla Glue or another super-strong waterproof glue that's safe for styrofoam
• Double-sided PERMANENT scotch tape will do great to secure the skirt to the hovercraft. It is much easier and will leave it looking better than duct tape.

General tips:

• Make sure you use a sharp knife so your cuts are clean.
• Use masking tape, not duct tape. It's lighter, easier to remove, and easier to apply.

Griffon Tips:

• If you have trouble finding large sheets of plywood, make sure you checked your local hobby store! Especially ones that have a large model train section.
• A nice way to make perfect circles is with a circle cutter. You can get these either from you local hobby/craft shop, or online.
• If you've looked at the online plans, and noticed they don't tell you how much you need, you can go to http://f5.grp.yahoofs.com/v1/APcjP6Itky-H0uelTdbLMmtqc3Olrc31QFZb8UTu510jNzgwtWLQHx192EbghVfqNiBHStHJoojBO-73OSxTTbYI8Ns/modeldocs/griffonplans.doc and look at the last page of the file.
• If you want the skirt patterns pre-enlarged, you can go here for them: http://www.ajmiddleton.freeserve.co.uk/ and click on "Skirt"
• If you are finding that fitting the skirt over the struts is hard, you can soften the edges using some Wood Putty/Filler that can be obtained at any hardware store.