I installed the BBQ clamp this evening by drilling and tapping the existing bracket. Aside from working while contorted under the steering column, it was quick and easy to set alignment and install the clamp.
This is absolutely the most bang-for-your-buck modification you could do on the Pioneer, and in my opinion, an absolute necessity. When I was in the process of test-driving the Pioneer before buying, the salesman pointed out to me that there is no parking brake. I thought it was a bit odd, but after a bit of operational experience, was unhappy with the amount of play in the transmission before the machine came to rest against the parking pawl. For five dollars, I'm delighted with the results.