We have finally confirmed that the current BBSS build is stable for both LHO and LLO, and we have figured out the model parameter set that matches the builds, so I've finally gone ahead and merged the parameter changes from the parameter set we had been using as the default for a while, bbssopt_2025_d0plus3p0_l1mins3p0_m2plus0p3_FDRd1plus3p5.m, into bbssopt.m (r12435). The differences between the original FDR parameter set (from T2000599-v1) and this hopefully final set are as follows:

• d4 -= 1e-3         Adjustment to get better fit to measurements 76071, 82138
• l3 -= 4.5e-3    Loop length change 79004
• d1 += 3.5e-3    Equal to blade position = -4mm
• m2 += 0.3           Mass added to M2
• d0 += 3e-3       Height change of added spacer
• l1 -= 3e-3      Wire length change to counter height added by spacer

I have used my compareallbbss_tfs.m script (CSWG:11252) to make comparison plots between the BSFM, the original FDR parameter set from T2000599-v1, and this parameter set. This parameter set has been uploaded to T2000599 as -v4.