Hi Folks,
Our house heating is currently provided by a coal fired Esse stove (Rayburn type thingy). However, seeing as it's hideously inefficient, we're looking at adding a multi-fuel boiler stove to the circuit, such as the Dunsley Highlander 10:

The trouble is, whilst
I can buy this stove online for £1600, including VAT I've now had two prices back from local installers which each come to around £8,000 including VAT.
This is made up of:
Stove: £1900
Chimney Lining: £1200
Chimwrap insulation £550
Stove installation (unboxing it and connecting up the flue pipe!

) £1200
Plumbing, basic controls and heat leak radiator £3250
Hearth - Not included
Grand total £8,100 including VAT

, which is totally out of the question.
So, given that all the bits can be bought for a fraction of this price, I'm trying to work out if I can do a DIY install of one of these beasties. Of course all of the installer's websites say that this is a terrible, dangerous idea, etc etc, but they would say that, wouldn't they!!
So, I wondered if any TAS folks had undertaken this work themselves in the past. I'm fairly handy, have a good knowledge of the plumbing and control side of things, and a friend who isn't scared of heights

. In particular, if you have done this before, how did it go with building control? (note, we're in Scotland, which I believe has different requirements to England with respect to installers).
Thanks in advance for your help!
Womble.