Not really. The ones I can see all have rim brakes, and if you switch from 26 inch to 24 inch wheels the brakes will no longer reach. But it looks like the frame and fork can take disc brakes, so if you're willing to switch brakes as well (or ride brakeless) then you're good to go.
You don't. You mount the pack on a frame--if you can find one--and attach the Y straps to the frame.
On the back of picture frame backings are hooks. when you get everything in the picture frame you just take your finger and move the hook under the frame.
All bikes have 2 brake pads, one one each side of the rim. There is no need for two different brakes on one wheel. I guess it could work, though. You would need to drill a new hole in the frame for the second brake but if you want to try it, go for it!
quarter inch drill bit
a big drill that sits on a bench. it has a large metal frame, and you turn it on and then pull down the handle, which lovers the drill bit, therefor drilling the hole. it is more powerful than a conventional drill, and more expensive.
a curtain stretcher is a wooden frame with nails protruding along the frame. when you wash the curtains, you take the edges of the curtains and attach to the frame until they are dry.
You build a frame of 2 x 4 from the base of the home to the ground, then attach boards or siding to the frame.
rubbing from brakes or rubbing from frame
The engine, a chassis, the transmission and gearbox, the brakes, the steering, and the frame
worn brakes could be the cause or check the A frame bushings
Rail allows you to attach accessories.