my friend has a wylex skeleton board present in his house that he wants changed so that he can rcd protect his sockets. are all wylex skeleton boards the same dimensions? and can i change from rewirable fuses to split load mcbs without damaging the walls? i have been told that the internal parts can be taken out and swapped over without damaging walls or removing the outer casing. the fusebox cover is missing so i do not have a model number. the house is about 15-20 years old. the only markings on the board are the manufacturer-wylex, cat-no 606 and BS 5486 part 13. can anyone help?