I think the clue is in the ‘fits by hand easy’. Tubeless rim and tyres, use maxxis they go up with track pump. Fit tyre and bash with hand all the way around to seat a bit. Track pump blows them up always. I then let them down and use a tyre leaver to make a gap to pour in two good cups of stans sealent. No faff with valve. Refit and blow up to 40psi and leave overnight, you will hear the tyre snap in to position. Let down to 20 front 25 psi rear, go ride. Works every time for me. Just changed my tyres and note the number of thorns I had collected and sealed with smug smile 🙂