Hi Gents,
There are other fastening tools on the market that will allow for a flatter, more compact application of putting both sides of the whiz-wheel together:
I picked these up at a local ACE hdwe store...a grand total of $0.62 ea.
they're 1/4" x 1/4" (~5mm x 5mm) Flathead screws, the heads are 1 cm dia. (brass)
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When making my WW, I elected to have each pic covered in plastic @ kinkos for ~$2.50 per pic.; however, if I would have pre-cut the individual rings, I could have put more than one item in plastic at a time--reducing the cost by half.
...Next time I'll know better
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Although I have many tools to do the job, I made my holes in the wheels by poking a stove heated ice-pick into the centers to form a pilot hole. I followed up by heating an old screwdriver (Phillips head) and finished sizing the holes to take the shaft of the screws. Very quick and easy.
Caveat: No, you don't need to heat the pick or screwdriver to red-hot, just hot enough to melt the plastic.
cheers,