The cupping kit will probably be a cheaper but beefier top kit, ideal for cupping as it will not ben so much under the weight of your pot but as already advised would probably be unbalanced at the end of the pole making it a bit top heavy. Be careful if you do use it as it will probably be the strongest part of the pole and in extreme cases you may put undue pressure on the next weakest part:-your number 4
. Keep tackle like laccies and line/hooklength balanced though (so the right bit breaks first) and it might be a useful tool. Could always keep it as a margin top kit for working top kit to hand.
HTH