See : https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=740109
This will let you add shots n hold to userstracks and adjust them as Pushes also.
Some userstracks in the Usertrack forum have the shots n holds already in them that can be used this way. These userstracks were made with holds thinking that PG would fix the problem, but I think it's been a while now.
Also here https://www.realband.org/usertracks.html