I've had my 861v6 updated today - using the flash installer & a serial null modem cable. All went swimmingly....
Anyone know which type of cable should be used to update speakerlink DSP8000.2's / DSP7200HC : a serial to RJ45 ?

Trinnov Altitude CI-12; Meridian 861v8 + ID41 + UHD722v2 + 271, 2*SE-update DSP8.2Ks, SE-update DSP7200HC, 4*DSP3200, 4*DSP33, 218, 251
JVC DLA-NZ8; Panasonic TX-P60ZT60E; Lumagen Radiance Pro 5348
Roon [13i7 Win.11 NUC]; SKY Q; Oppo UDP-203EU; AppleTV / Fire Cube / Roku / NVidia