Not being a bowler, I'll restrict my comments to your foliage.
My garden weeds are like your cacti,
have wooden over so I need a chainsaw to cut them down. Asked SWMBO (who is a gardener), "What type of tree that was?"... "It's a weed that has wooded over you idiot!"
If your first cut is too short... Take the second cut from the longer end... LBD