Before you even think about this, get a small mirror, and a set of screwdriver/socket things with a long extension handle.
With these tools it is okay.
Thx for the FULL advise (only quoted a small bit to ref). I have quite a largish tool set - many screwdrivers, LOTS of sockets, extension (wobble bars got nicked, must get some new ones sometime) Torx and hex bits and T-handles, spanners, 4 torque wrenches AND a torque wrench tester (ex MOD) which I use to test them occasionally to make sure they are still in spec, brake bleeders, compressor etc ... but no mirror
I DO have a laptop with a USB camera and LED light on a 2m lead I can use to record a video with and watch at leisure in comfort. Think it cost me about £5 from China. Quality is so so, but OK for garage work. I was going to get a mirror, but at the price this seemed a better option. :-)
Sometimes though, as with the elearn instructions this time, I cannot find the location of things. I probably have the tools needed - but thanks for the advice, I will double check I have what I need.
I always find the first time I do something can take a long time (especially on the 156 as I can't find things ... I spent about 4hrs just looking for the oil filter yesterday!) - partly because I like to do it exactly right. Second time around is always MUCH easier.
Thx to everyone.