Recently Purchased XC90, Few questions

[Ryan2507]

Evening

Couple weeks back i purchased a 59 Plate XC90 R design D5 geartronic to replace my wifes 525d E61, very happy with the car so far although it is a little like driving a tank and just about everything is a blindspot... but very nice to drive.

The cars on 92k and id planning on doing some piece of mind maintenance, well getting my dad to do it whilst i hold the torch in the wrong place..

First question.. Iv bought a cambelt kit and some coolant as it came with a pump, iv found some guides and also have haynes manual for reference but does anyone have any good tips that i might have missed?

2nd question.. i want to do a gearbox oil change but have seen various posts of various different methods, is there any general consensus on best method and can any one link in a good DIY guide with pictures.. struggling to find one with forum search. Also iv seen recommendations for AMSOIL, is there a consensus and reasoning for this being better than volvos own ATF, I dont mind paying more to do it the best way possible if its going to increase chances of the gearbox having a long life.

3rd question... my wifes a hobbit and my kids are young so id ideally like some running boards, iv seen threads about using spacers to get original volvo steps to fit on a R design but iv also seen alot of posts saying theyre pretty useless anyway unless you like dirty legs, has any one found and had success with any aftermarket ones that are more like the ones you get on Q7s and range rovers etc?

Final one.. Any suggestions for other good preemptive maintenance specific to these cars?? car has a well documented service history, but the words "sealed for life" and "lifetime" seem to appear alot from what iv read

thanks for any help and input

Ryan