Its perfect. Thank you very much Didi. It worked like charm.

I ordered laser unit from
Product Details: SFHD4/BLACK CAP AUDIO SPARE LASER PICKUP FOR DVD M3 4.6 LASER

for £32 and bought a soldering iron for £15. Borrowed trox screw drivers from a friend, all it cost me was under £50.

Good pictures and explanation it really helped me.