So issued the command
M997 B20 S3
Tool fan spun up and so far 2 mins in nothing else has happened
M997 B20 S3
Board 20 starting bootloader update
Restarted the machine and now have this...
m122 b20
Diagnostics for board 20:
Duet TOOL1LC firmware version 3.2.2 (2021-02-11)
Bootloader ID: SAMC21 bootloader version 2.3 (2021-01-26b1)
Never used RAM 4032, free system stack 94 words
HEAT 90 CanAsync 89 CanRecv 83 TMC 66 MAIN 218 AIN 70
Last reset 00:00:13 ago, cause: software
Last software reset data not available
Driver 0: position 0, 412.0 steps/mm, standstill, SG min/max 0/0, read errors 0, write errors 1, ifcnt 51, reads 6920, writes 12, timeouts 0, DMA errors 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0
No step interrupt scheduled
VIN: 24.3V
MCU temperature: min 23.6C, current 23.6C, max 23.7C
Ticks since heat task active 148, ADC conversions started 13850, completed 13849, timed out 0
Last sensors broadcast 0x00000002 found 1 151 ticks ago, loop time 0
CAN messages queued 160, send timeouts 0, received 134, lost 0, free buffers 36
seems to be working with M280 P0 S10 and S90. Will test tomorrow after I have redone my Z offsets....