LG290P only 10Hz?

I appeared to successfully change the update rate to 50ms:

$PQTMCFGFIXRATE,W,50*5D

But I’m only getting fixes every 100ms? Is there something else to change, or does the 290 not run at 20Hz? I tried a few timings and it definitely has preferred intervals, eg 110ms failed. I haven’t tried RTK, yet. I have the same aliexpress module as a lot of others here.

I’ll actually use the LG290 as a base station, but if it can run at 20Hz+, I’ll get an LG580 for the ‘rover’.

…probably depends on the firmware version.
I can’t verify because I left the board
see the different notes: 2.3.15. PQTMCFGMSGRATE


but
immagine