At the risk of upsetting people who know better than I, you don’t need to unsolder the display- it’s just held onto the back of the glass by 3 sticky pads. Getting those to release without pulling the black paint off the glass (ugly outcome) is tricky but possible. Very slowly with a micro screwdriver to just gently tease the pad away worked for me. I found this out by not knowing that you’re supposed to unsolder…..

Lounge: G61RSL, DSP3200, DSP3300, DSW, HD621+Vertex2, SBT, Kef Ci160.
Office: DSP33, D1500, SBT
Archive: 568.2m, 562v3, 562v, DSP3100