Collimation tool?
I'm trying to understand the pros and cons of different collimation tools, like the collimation cap, the Cheshire (long vs short type?) or this concentric tool: https://www.teleskop-express.de/shop/product_info.php/language/en/info/p5507_TS-Optics-Concenter-1-25--Collimation-Eyepiece-for-Newtonian-Telescopes.html
A collimation cap came with my telescope (Heritage 150P) and from what I can see in that everything looks ok, but I would like to have something a bit more precise.