Just cut your cupping kit back to the same length as your top kits, or get one of the Garbolino extending ones, they’re quality.

I use a Daiwa cupping kit and Drennan cups, I’ve telescoped it rather than put over then cut it to the same length as your top kits. You now need to drill out the adapter so that it fits over cupping kit, make sure you drill it central and vertical.

@samstone wrote:

how do you know what drill bit to use?

ideally you need a drill stand.
if you haven’t got one,
i’d say a lot easier way would be to cut back your cup kit so that the adapter is a nice firm push fit.
then cut sleeve and araldite the cupkit back till it’s the same length.
i cut and sleeved my 754 three times to be the same length if you do a neat job you can hardly tell its been done and it also makes the cup kit mega stiff too.