Mountain biking 38:37 [3] 3.52 mi (10:58 / mi)
HR data not reliable from this session. I had received the Gay City State Park bike-O course from Becky, constructed a jury-rigged bike-O map holder, and wanted to give it a try.
I think the design is workable, but needs fine tuning. I used cardboard and duct tape to attach the cardboard base to the handlebars. I created a rotatable map board out of a smaller piece of cardboard, map case+map, baseplate compass, duct tape, and a brad (brass T-shaped bendy thing with two prongs that can be bent apart to secure both pieces together).
Note for future designs:
1. Use a robust brad, not the tiny p-o-s I had around the house. Each time I jostled either piece of cardboard, there could have been a tendency of the brad to release its grip.
2. Use baseplate compass only, not baseplate compass + whistle on a lanyard. (This part worked well. When the rotatable map rotated to match the terrain, the compass needle pointed north, and vice versa. Hooray.)
3. When affixing the bottom cardboard to the handlebars, a figure 8 of duct tape is superior to the U-shaped, completely underneath the board, system. However, I wasn't careful to keep the tape from going over the gear shift levers. The figure 8 began on top of the bottom board, running NW to SE, looped under the R handlebar, returning back to the top of the bottom board running NE to SW. On the left edge, the tape begins on the board running NE to SW, loops below the bar, and returns back to the top of the bottom board running NW to SE. Advantages: the bottom board doesn't slide fore, aft, left, or right, nor does it have enough slack to pitch forward. Disadvantages: Duct tape blocks part of usable handlebar grip, can also block gearshift levers if careless.
Unresolved issues:
When the rotatable board is oriented such that it's completely above the bottom, the rigid bottom keeps the wind from pulling on the top board. When the rotatable board is oriented such that it sticks out beyond the front/rear edge, there is a double whammy of undesireable effects. One is the sail effect of the wind pushing against a movable top board. The other is the inadvertent jostling of the top board with knees or thighs. I experienced both, issuing some "choice words" at the flimsiness of the attachment.