DIY Handplane Leash

Since Summer's in the air, I figured it was time to pull out the handplane I made again and make some things for it I've been meaning to in time for warm water bodysurfing season (with a hope for some hurricane swells!).
I haven't lost the handplane yet out in the water, but I thought it might be good to have a little insurance. I wanted to make a leash, but nothing too obstructive that would get in the way. Around the house, we had one of these keychains with a plastic coiled cord:

I just needed the coiled cord, so I removed the key ring from the one end and used a pair of tin snips to cut the hook end free from the cord:

Next, I made a wrist strap by cutting off the last 2 inches of an old neoprene wetsuit sleeve:

Cut off wrist of a wetsuit sleeve

If you need a bigger cuff, just cut a two inch section higher up the arm. To attach the cuff and leash, I used pieces of kumihimo cord I made before (or you can use boat line), and overhand knot tied off to one side of the hand hold and made a lark's head around the neoprene cuff:

All leashed up!

That's it! I'm going to leave this leash attached to my board, but I can cut the tie off if I want. I plastic zip tie would work great too, I just wanted to avoid using any metal that could scratch up the board or get rusty over time.
I wouldn't expect this to hold in super heavy waves, but then if I get into a super heavy wave and get tossed, I don't want a square foot of poplar within close proximity to me anyway....