>>1398020https://www.amazon.de/dp/B00J3NWEK4will this do the job? it resembles the one at 4 mins in here:
https://www.youtube.com/watch?v=mU-I-Qd6hCwhow many spacers will i be able to have on top of the stem safely? i'd like to try at least 20mm on top before committing to cutting the steerer tube.