U have to cut the tube not so long and not so short just in case u have problems with the new position

Always measure twice and cut only once and always leave 1 or 2 cms extra just in case u want to sale the bike too, sadly u just cut that neck out w/o apparently figure it out if you were going to get used to the new position or not
Many bikes get lower interest because of the steering tube cut way to low. Well good luck ok just wanted to give some advice to the saw and dremell ayatollahs because this is the typical screw up
Good luck op
ps: hope u dont care about how your bike looks