Back in either 1991 to maybe it was the year of 2000, I talked with Ned Morris and he made me about 10 jump cues where the shaft was real thick and the butt can break down into two pieces. I have used the same jump cue to this date. Totally awesome, easy to put English on the cue in case you have to jump with English and spin off a rail, holds straight line really easy. I have kept one. At the 2000 wpba us open in myrtle beach, Loree Jon Jones hit the most amazing long jump shot with extreme draw (about 5 feet and drew for perfect shape on the six which was sitting on the rail at the foot spot. Never did get that particular jump cue back, lol. Ask Ned about that shot sometime, he looked like a proud papa who just had triplets. Best live shot I ever saw in a high stress situation, bare none.
Check with Ned, maybe he would make you one with the thick shaft. I have one left, $ 200.00 shipped. The ones I saw Ned produce after this came with thinner shafts to fit in most cases. If your current shaft can go in your case, thread side first, this will fit, if not, don't think so.
Great cue for dart and underarm jump shots.