Fitting a thermostatic shower yourself

[Bigpaintinglittlepainting]

Just wondering if anyone has fitted a thermostatic shower themselves?

Or shower handle has broken so it permanently drips heavily. I have found a direct replacement for it and I'm trying to convince my very handy dh to have a go at fitting it! It will cost £200 in vat and labour to fit so it would save a fair amount to do it ourselves.

Is it a terrible idea? It looks fairly straightforward from YouTube videos

https://www.plumbworld.co.uk/colonial-exposed-traditional-thermostatic-shower-valve-with-fixed-head-rigid-riser-kn2shxrrc-18174-1254921?msclkid=03b46fe0eaca11c6bf1f0bf4a159ba3f&utmsource=bing&utmmmedium=cpc&utmcampaign=Shopping%20%7C%20Supplier%20%7C%20Bristan-G2023441657&utmmterm=4578435164425634&utm_content=Bristan

I've done this twice.
Make sure you have PTFE tape to wrap the screw thread in when you replace the bar. I kept the existing showe head and just changed the bar.

Also put something to protect the bath/ tray down …. Lots of it they are heavy and will do damage if it drops.

So long as the pipe spacing is the same it's straight forward.
You'll have a few spare parts as you'll be wanting to keep the existing pipe mounting plates that form a compression joint with the bar inlets.
As said ptfe tape (wrapped in the correct direction) and a well set adjustable spanner with cloth over the nuts to protect the chrome.

@Bigpaintinglittlepainting This should be very easy! Just remember to turn off the water. Then unscrew the backnuts, & remove the old unit. Use new washers when fitting the new one.