To maintain a balance:
The commercial company I work for use Ronaldson both for Lycoming engine overhauls and component servicing/repair. We've never had cause for complaint in the three years I've been there, turnrounds are as quick as can be reasonably expected and Rachel in the front line is excellent in regard of customer service.

Have paid a lot of money to several organisations over the ten years of running 5 very busy aeoplanes.

The ONLY organisation that I would recommend is NM.

I have not used Neil Andrew's organisation but I worked with him when he was at NM and he is clearly a capable and good bloke.

Has anyone any experience of using MultiFlight at Leeds?

I have a Lycoming which requires O/H, I have spoken with Norvic, Ronaldsons and MultiFlight.

I will now be looking at others suggested here.

Cheers.

wigglyamp
 

My apologies if I implied some kind of hidden advertising or Victor Kiam syndrome.

We did indeed use the company to which you refer and followed same to Nicholson-McLaren Aviation after that buy out.

We remain content customers of NMA and latterly AEP as well.

Edit to add to the OP, try a search on PPRuNe and the Flyer forum (if you haven't already)and see what names come out on top. There's a lot of info out there from both private customers and people 'in the trade'.

You will notice the difference with a newly overhauled engine - that is a fact.

Yes, one of our customers had his PA 28 engine done by Multiflight and it now has in the region of a thousand hours on it with no problems.