The 2x3 A-frame I used for my Capri 22 out of lumber, was replaced with 2x4s for my Capri 25, because the mast is significantly heavier. The better pictures were of the Capri 25 setup.
I am using the same system for my S2 7.9, that is about 30lbs MORE heavy than the Capri 25, and probably nearly 60lbs heavier than the Capri 22 (also about 3-5 feet longer than the Capri 22). To make the device more "portable" I used threaded eye-bolts with wing-nuts at each corner of the A-frame... I usually removed 1 eye-bolt from the corner, and folded it down to a parallel pile of 3, 2x3s. Also I had the racing package, and didn't use a bale at the spreaders, I used my Spinnaker ring (much lower, so harder initial pull).. Using the spin ring allows you to avoid having to rethread the bale at the spreaders to lower the mast.
The A-frame is the simpler way to raise the mast, because it doesn't require the baby-stays... The painter pole arrangement will certainly be lighter. My total cost to build was probably $5.. as I had the lumber.
By the way, the S2 guys use baby-stays, and the spinnaker pole in a gin pole arrangement. It seems to be the preferred way to raise the mast.
