Have you come up with prices yet?

You'll need a 'normal' retail price to publish..
.......then those that back a 'kickstarter'...
...get a discount off that .

Its a good system in that you get 100% valid orders PAID upfront...
..rather than 30 people saying YUP..then never following through.

However, you need to get enough to finance.. in order to satisfy
the orders for those that do put money upfront.... or you have to refund I believe?

IIWY.... I'd start with the front/back & side skid plates.

Offer a package on all 4 ( front/back & two sides.)
A deal for just front & back
A deal for front OR back
A deal for just sides.

Just my 2 cents!

Jo