There can be some issues with running soda/type drinks through plant that's designed for beer. One of the breweries I worked at also produced FABS (flavoured alcoholic beverages - usually fruit-flavour) and a couple of things come to memory:
1) Seals and other non-stainless parts did pick up taint, so have to be changed;
2) As these drinks tend to have a higher sugar content, it's important to clean through very thoroughly afterwards, preferably hot;
3) They're often more acidic than beer (around pH2 rather than pH4) so can be more aggressive towards materials.
Regarding CO2 levels, 2.9vol. is not unreasonable for canned/bottled beer so I wouldn't see any problems from that direction. You may need to adjust pressures (sorry, but I'm not familiar with the exact kit so that's a bit general) to control filling, etc.
Hope that helps!