[TenTec] How do the new filters work in the recent Jupiter Firmware upgrade?

[NZ8J]

I haven't seen much talk about the new Jupiter firmware other than the
problems some folks had initially upgrading.  I'd like to hear from those
who have upgraded their Jupiter's to the latest firmware and specifically
how they compare the cw filter performance to the older version that only
went down to 300hz.  Also, just what does: " Modified RFGAIN cotnrol
manipulate hardware and DSP RF gain" mean in operational terms? (That came
directly from the rfsquared site)

Thanks
Tim
NZ8J