Welcome to the Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines - Enjoy!
I've always wondered Benny if putting the target at the back of a deep cardboard box would work - the laser beam is still there, I just can't see it in the sunshine/daylight but should show up back in the dark abyss!
That's a cracking job you're doing there Larry. Wish I lived a bit closer to you. Allan.