One possible catch which comes to mind if you put a 2nd track onto the mast, is that if you're running a main with full batten hardware
, you may run into some issues with said hardware
impinging on the 2nd track. Possibly to the point of doing some damage to either, or both; if you tend to run with the main let out all of the way forward much of the time.
That, or if the track's in the wrong spot, depending on the curvature of your mast section, it could chafe your main a good bit under such circumstances as well.
It's be worth looking into.
I believe it's Harken
, who makes a glue on mainsail track. If not them, one of the other major manufacturers. And IIRC such was developed for carbon fiber masts. Though I can't see why such a thing wouldn't work on aluminum mast.
If memory serves, I read about it over on Sailing Anarchy Forums
, within the last year or so.
also makes what looks to be a very efficent gate system, for their mainsail tracks & cars. So that you can either; greatly reduce your stack height, or have a trysail on it's own "spur line" of track, down on deck. And hoist it up via the main track without much hassle when you need to.
The catch being, the price
of their hardware. But if you go with their track variant which you drill, tap, & bolt into the mast, it's reasonable. Assuming that you're selective about which kinds of mast cars which you choose.
Albeit, with their system, you need a LOT less cars than with the Tides setup.
There are plenty of other options for a 2nd track too. And IMO, it's worth having such a setup for your Trysail.
That, along with it's own dedicated halyard
. As wrestling with the main halyard can get quite tricky, even on boats with low booms/stack heights, when it's stormy. And if you're going with a Tides system, you definitely wont have a low stack height.
So then you'd be forced to go with a couple of steps on the mast down low. And to climb them, to unshackle the halyard when things are at their worst. All while both, trying to hang on, & also not to let the halyard go flying skyward, once you get it unshackled.
So, I should think that having a pendant to clip onto the main halyard, once the sail's down would be wise. That way you can properly tension the halyard against it so that it doesn't beat all of the paint
off the mast, driving you loco in the process.
And it'd avoid the wrestling with the halyard scenario above.
Also, I wouldn't fret much about how to attach a 2nd track to the mast. I mean, there are plenty of aluminum masts with stainless steel
tracks screwed onto them with stainless steel screws, which have held up fine for decades.
Just drill & tap like you normally would, & coat the machine screws with Loctite. Something like Blue would be best, as it allows for removal
with hand tools, but keeps things from vibrating loose.
And the perk of using Loctite or similar, is that it'll give you the galvanic isolation which you're looking for as well.