Alt Bike Culture - gravity bike: Mtb fork a no-no?

in all the pictures it seems like people use bmx forks or motorcylce components. are there any downsides to using 20" wheels in a fork made for 24s?

speed wobbles? height?

obviously mounting brakes will be a challenge.(actually maybe not! see the mounts on the front fork near the edge of the tire?)

http://img534.imageshack.us/img534/4394/dscn1952x.jpg (http://imageshack.us/photo/my-images/534/dscn1952x.jpg/)

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I'd think ride height and brakes would be the major problems.

i used 20" tire in forks meant for 26" tire. ever time i have scrapped a set of suspension forks since i usually cut the brake think off so that i could weld them where they would work.
heres a picture of the forks. you can see the brake system on it fairly easily.
https://lh3.googleusercontent.com/-W1x2plDqyCE/TfjCpZ5BosI/AAAAAAAABSU/ldmokPoAjpY/s640/IMG_2589.JPG

i just added a pic for reference. it actually appears to have v-brake mounts in approximately the right spot; maybe i won't need to modify anything.

i'm mostly concerned with how it feels at speed. if anybody has any experience riding one, please chime in. i already expect the handlebars to want to fall away at slow speed, i'm wondering how it will feel cornering while 40+ mph.

in all the pictures it seems like people use bmx forks or motorcylce components. are there any downsides to using 20" wheels in a fork made for 24s?

speed wobbles? height?

obviously mounting brakes will be a challenge.(actually maybe not! see the mounts on the front fork near the edge of the tire?)

http://img534.imageshack.us/img534/4394/dscn1952x.jpg (http://imageshack.us/photo/my-images/534/dscn1952x.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)

The biggest problem I see is with smashing your face into the stem.

Have you considered mounting the grips directly to the fork and using a simple clamp for a top cap?

Also, if you can arrange the position to use your knees for lifting your body...it could really save your nads.

Keep at it brother. You're doing fine.

Just so you don't think I was mocking you, coasting bikes are something I've given thought to over a very long time. Here's a picture I drew when I was roughly 11-12 years old:

http://i95.photobucket.com/albums/l156/Wordbiker/CoasterBike001.jpg

As kids we used to hitchhike up Chantry Flats road to coast down. After a while we installed rear axle pegs, banana seats so you could lay on your belly, miniBMX bars that were flipped upside-down as clip-ons, and we'd bring a crank puller and a strap to get the cranks and pedals out of the way.