I have done quite a few myself
No longer using the setec charger/power supply
Installed 25 amp 240v ctek charger
Ctek dc to dc charger/regulator
LED lamps everywhere including range hood
2 way strip light leds to tunnel storage
12v Outlets to all beds
Double 12v outlet to outside onone sinde and a sinle to the outer
2 x USB outlets to front bed
Surface led lights to each side of the van
Moved spare to underneith on winder
Stainless steel basket to spare tyres old position
Custom box to draw bar
Flexible gas lines to bottles
Water tank gauges
5000w inverter
Victron BMS
3 x 110ah batteries
2 x 130W solar panels
Out with standard 3 way fridge and in with vitrifrigo 150l compressor fridge and wired in new circuit for it
2 step entry step
Fusion 700 marine stereo with remote head outside next to door
Video cables from stereo to tv to stream videos from ipod to tv
Shelves to robe
Reversing led flood light
Truma e2400 gas sapace air heater installed:first:
TV and wall bracket installed
Inside and outside speakers (tv can play through these aswell)
Remote controlled light with dimming function
Double jerry can holders to drawer bar
Replumbed drainage outlets to no hang down so low and ugly
Water proof bed ends
suction style shelves and roll holders to kitchen and bathroom
Substancial velcro 50mm strips to underside of cusions to stop them moving
Custom kid barrier to rear bed (same concept as the ones that come standard in the flamingo campers etc)
Relocated all switches and controls up away from kid height
12 pin plug and anderson plug
Roof top air
Anti flap bars
Outdoor table
Removed orange sign writing and changed to green to match the boat
Just bought yesterday a full padded storm cover aswell
Thats enough for now, until I think of something next else next week....This thread might give me more ideas!