Mike,
I bought and fitted the reich mover to my first van, Bailey ranger 460/2.
I then removed it and fitted to our next van LMC 520 hte.
I`m not brilliant at DIY, but am a time served electrician, all be it 40 yrs ago, however if you follow the instructions you shouldn`t have much trouble, it took me about two hours.
There are holes to drill thro the floor but dont worry a good sealent soon plugs them.
I bought my Reich from a dealership down south (mail order)I cant remember their name (old age) but they have been mentioned on this forum not long ago, they gave great service, as did Reich UK when I burnt out the control box when fitting to the LMC. Reich UK supplied an exchange box free of charge, lets see you get that from a UK company.
good luck mate Tony A.