[Grandpa Grumpy]

I think you are on the right track by switching to lighter bands.

Are you maxing the bands out? If so cut the bands slightly longer so you reach your anchor without maxing them.

 

[Grandpa Grumpy]

It seems a lot of things from archery transfer over to SlingShot shooting, I shoot my compound bow with a very relaxed grip almost open hand but with a wrist strap to catch the bow after the shot.

My first SlingShot had no lanyard hole and I had to remember to grip the SlingShot or it would jump out of my hand after the shot and hit the floor.

I consider a lanyard almost a requirement. With a properly fitted lanyard you can do the archery drop with a slingshot. Saunders Archery sells a slingshot made specifically to use the archery drop, I don't think an expensive specialized slingshot is needed when basically any slingshot with a proper lanyard can do the same.

I have tried the archery drop with slingshots and did not care for it but I use the lanyard because I can use a very relaxed grip.