I’ve never been a fan of the bump control system on brush cutters/line-trimmers.
I have kitted mine out with one of these gizmos,
Unfortunately, most trimmers fitted with a “cut to length blade” are designed to encounter 1 or 2 “lines” and battle to come to speed with 6 danglers… at least that’s the story with my cordless 36V Ryobi trimmer.
Not only that, I hate the thought of crawling on all 4’s trying to find the 6 pieces of orange off-cuts, if it actually managed to sever them.
These are the “bulk singles” that I buy,
which are 20mm too long and trying to get the right length was a PITA.
I cut a piece of PVC tubing to the appropriate length, plugged one end with a piece of 16mm dowel and used that to measure 3 pieces to length at a time. Unfortunately, the curve and the rigidity of the line's plastic made it a hassle to fish the pieces out of the tube's top. I considered some sort of plunger design so I could push the pieces out of the tube from the bottom.
Went into Bunnings plumbing department with hope of some sort of inspiration and found this tube with the spring clips, that got me thinking. My first thought was to glue a piece of dowel into part of the clip and clip that at the bottom of the tube, insert the line piece(s) and cut to length, The glue turned out to be a no-no... DOH! spring loaded clip and glue is not a good mix. Salvaged with the use of 3 pop-rivets,
so it easily slipped on/off the end, permitting easy extraction of the lines. In fact I could just about fill the tube and just make 1 cut... still trying to figure out best way. The three I cut with my flush cut pliers, which didn't crimp the cut, for easier insertion into the trimmer head's holes.
Any tube cut to length will do, to compensate for the spring in the bent/coiled line and most people only having two hands.
If your first cut is too short... Take the second cut from the longer end... LBD