I have a suggestion for your next software update for the 3400/3500:

The little magenta groundtrack arrow (the little triangle that sits close to the heading bug, that is; if there's not strong a cresswind) is very hard to see at times, specially in bright light conditons.

Maybe it'd be possible to make it more visible? Either by making it bigger or maybe change the colour?

Of these two options, I guess the size option is better, so the colour-scheme can be consistent.

Regards Alf Olav