Sky-Guy, glad that worked out for you, as for the boomerrangs (fish) not showing more then just small dots, I would guess that either your gain might not be set high enough or possibly, there weren't any fish swimming under your boat. Usually its just a matter of fine tuning the unit and learning the features.
Oh yeah, 1 other possibility, always have your depth range set at the next deeper setting then the water your in, for example, if your in 100 ft. of water, you should be on the 120 ft. scale, this will give you a larger fish image then if your on say a 300 ft scale.
As for the boat covers, sorry, I don't fore-see any sales on them anytime soon.
Thanks for letting me know how that new head unit worked out, let me know if you have any other ?'s.