Easiest/most economical way to build a pickup roller

[jlian]

So I should get

- Aluminum tubing from local aluminum shop (http://www.alustock.ca/Square-Tube-SC-1x0.125-AMR1465)

- AndyMark or VexPro hex shaft (http://www.andymark.com/product-p/am-2291.htm?CartID=1)

- 2 BaneBots Wheel, 2-7/8" x 0.8", 1/2" Hex Mount (http://banebots.com/pc/WHB-HS4-298/T80P-295BA-HS4)

- 2 BaneBots Wheel, 3-7/8" x 0.8", 1/2" Hex Mount (http://banebots.com/pc/WHB-HS4-398/T80P-395BA-HS4)

- 10 (?) Clamping Shaft Collar - 1/2" Hex ID (http://www.vexrobotics.com/shaft-collars.html)

We have some geared motors (http://www.andymark.com/product-p/am-0915.htm) coming as a part of FIRSTChoice. What should we do in terms of sprockets: 25 series (http://www.andymark.com/product-p/am-2182.htm) + (http://www.andymark.com/product-p/am-0749.htm)?

Putting the shaft through the aluminum tubing - how is this done? Is there enough space for hex bearings?