I once got a free Wilson Staff golf shirt and golf hat for buying a dozen Wilson Staff "Smart Core" golf balls! And, at a discount price! I can't imagine what that promo cost them. I long ago lost all the balls, but I still have the shirt and hat!
One time I went to a local public course (Donald Ross design, no goat track), during the middle of the week. The pins were cut in some pretty bizarre places. I knew the greenkeeper and ran into him after my round. I asked him about the pin placements, and he told me they do that during the week to save the middle of the greens for weekend play, which is always heavy!
And lately, after nearly every course around here has aerated their greens, we've seen pin positions that we considered very marginal! These things were set on top of little knobs and humps which would defy pros to putt them! Plus, the greens were lightning fast, so we were facing "shepherd's crook" putts the whole round.
Still, we were playing golf in nice weather in mid to late October in NE Ohio, so how much could we complain?!
If you are referring to the frame shown where I am swinging. That was also made from 1 1/2 inch PVC in a sort of Half Octagon Base. I have photos some place, but no longer have the instructions. People liked that one at the time and I received a few requests for plans.
@iacas Nice job on the videos. I have fooled around a bit with a home made version. The concept is fine, works well, but (for me) not much better than a simple alignment rod stuck in the ground at an angle to simulate hitting under shoulder plane. I can see a benefit in gradually swinging through a narrower slot and also the ability to show effects of "getting stuck" using the lower arm. Thanks for the excellent demo.