Yep, rubber bands and paperclips for now. May upgrade to springs someday
The plexi does flex a little bit but I wouldnt say it warps. The plexi is 1/4in think and pretty rigid. I do need to bend or cut down the spikes a little bit because it wants to push the plexi twards the center or at an angle. If you look real close you will see 2 %$%$%$%$ings, one on the inside edge of each wheel. I put them there to keep tension on the wheels. Drilling and taping the %$%$%$%$ings for set screws was the hardest part, took about 10 minutes to find the right size drill, tap and set screws. The rest went together in about 20 minutes. I did notice it helps to space the plugs out as Im putting them on or the tension really wants to skew the wheels.
LOL, aparently I cant say %$%$%$%$ings here so replace that with collars
