The turning mast part on the welding bench. Heavy pipes welded together to make a three meter pipe. The upper part is for above the support bearing. The lower part is going to the rotor. If you do your best (good on you Hans (PA3CCX)) !! the welding is very professional !! See next photo.

After some little calculations:

- Rotor + support bearing:  4kg

- All brackets for rotor and support: 5kg

- Rotor pipe 8 kg

So together we have 17kg for everything except the antena itself.