[UK] WTB chipped PS2 or installation of a modchip

TLDR: I'm looking to buy a chipped PS2 (regular or slim) or pay someone to install/fix an install of a chip on my PS2. Thanks!

Right, so a bit of an explaination of where I am so far...

I bought a modchip (Modbo 4) a week or so ago and tried to install it into my slim (77003 GH-051-02 - a v15 I think?). Soldered everything where it should be (I hope) and I can enter the Matrix Infinity settings menu on boot. However my games won't play and I only seem to be able to run pressed DVD videos. I've resoldered all points that I could have got wrong (mainly the BIOS ones - the tiny solder pads) only to have the same problem (unable to play games) happen. I figure that I must be doing something wrong with the install.

So I've come to the realisation that I'll have to buy a premodded console or pay someone to fix my work. If you're up for having a go at installing the chip, I'll be more than happy to send it your way and pay you for your time & return postage. I can provide a spare Modbo 4 and don't mind desoldering what I've done so far so that you have a clean slate to work on (I would provide a picture of my soldering to help you decide but unfortunately my PS2 is about 50 miles away from me until the weekend).

Alternatively I'm up for buying a premodded console, slim or fat. As long as it works I'll be happy!