Rain gage clamp ... or ... gilding turds

Milady wants to put a rain gage on her deck. We had an extra one. It needed to be mounted on a board that could be secured to her deck.
So I found a board, cut it off square, sanded it nice, gave it a coat of Danish Oil Finish, zinc-plated the screws and mounted the instrument to the bit of board.

How to clamp the board to her deck so the wind won’t blow the rain gage off during a storm?

Attachment 46028

The tee part goes down thru the cracks between the deck boards, then the assembly is rotated so the T is perpendicular to the crack.
It’s all stainless steel, will never rust. The clamp foot rotates and wobbles freely; it’s pinned to the threaded part like C-clamps are.
Joints are silver-brazed.

Why do I do stuff like this? Because, being retired, I can do whatever I want!

<!-- BEGIN /var/www/html/homemadetools/protected/modules/zeus/views/tool/postUpdate.php -->
Thanks Don42! We've added your Rain Gage Clamp to our Miscellaneous category,
as well as to your builder page: Don42's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-rain-gage-clamp"> <img src="/uploads/260183/homemade-rain-gage-clamp.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-rain-gage-clamp">Rain Gage Clamp</a> <span> by <a href="https://www.homemadetools.net/builder/Don42">Don42</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/gauge'>gauge</a>, <a href='https://www.homemadetools.net/tag/mount'>mount</a> </div> </div> </div> </div>
<!-- END /var/www/html/homemadetools/protected/modules/zeus/views/tool/postUpdate.php -->