The hardtop is the same one I had custom built in the USA before importing. The mast is the original one. Back when there was a bimini, the mast base was on the flybridge sole, and it had a hinge joint about halfway for lowering. The hardtop had a recess/cutout for the mast which still came off the sole.
What I did last year was cut the mast off just below the hinge, and then lift the top half up to mount it onto the hardtop. That lifted the mast up by about 750mm, enough for us to add a new radar platform. I used the old radar platform for the sat dome. It turned out quite well, and the mast can still be lowered if necessary. The pic shows the setup, with the tall VHF antennae lowered to avoid shading the solar panels.
This all came about by the need to relocate the sat dome so I could move my solar panels forward by 600mm and reduce shading of them by the hardtop. That has been a success too, solar is giving great output.