Sky Surfer V RDF battery probs

[RascalUK]

Hiya. Looking for help from anybody who might know this equipment.

Bought one second hand recently and really like it but it's cone to battery change time and I cant get into it to change it.

There is a screw cap with a slot for a driver or coin on top of the brightness wheel but I can't budge it. Every time I try and turn the screw cap the brightness wheel goes with it.

Am I being gormless?

[Breakintheclouds]

I managed to unscrew mine with a coin - I guess I must have held the brightness wheel at the same time. Perhaps a little squirt of WD40 in case it's got a bit sticky?

[RascalUK]

Yeah. I can't hold the brightness wheel tight enough because it's jammed solid. Will try the wd40, not a bad shout. have a feeling it may be cross threaded.

Failing that it'll have to be a wrench or a vice but that's gonna damage the paintwork unfortunately.