garmin 410 help

Set up different screens for cycling and runningn (pace vs mph).  When you get to T1, turn it on. (I leave it strapped to my handlebars)  It should be ready to record as you're exiting the gate- so hit the start button at that time.

During the last few miles of the ride- I remove it from my bike and put it on my wrist.  (easier said than done)  At T2, hit the lap button as you're entering the transition gate, then again when you're leaving it.   Hit stop when you finish.

You'll be able to figure out your bike split, T2 split and run split this way.  It's fine if it's in cycling mode during the run, or vice versa.  If you try to change the sport mode in the middle, it will stop the current timer and you need to restart.  You can do this- but it will take some time, and you don't really get any benefit from this. 

I have the 410 and I really like it for training.  Don't think I will every use it for a triathlon though because I don't want to have to think about putting on a watch after the swim.

As far as the cycling function, I don't have the cycling/cadence accessory neither.  Although, I do like using the cycling mode when I train as it seperates the cycling and running from each other when I upload to Garmin Connect.  Other than that, I don't see any reason to switch.  I have thought it would be nice iof you could easily change the mode without resetting the data.