i forgot to mention that you have to take into accont the scale length of your instrument. yours in probably a 23 or 24 inch scale. then to tune way up to g to g or a to a of g to a you would need very light strings. if a shorter scale, like 20 inches to 22, then heavier strings. you may have to mix and match a bit untill you get what workd best and what you like.

the scale length i am refering to is the distance between the nut and the saddle, otherwise known as the resonating string length. you will have to adjust the intonation for different tunnings as well--asumming you have a moveable bridge.

if not you may have to intonate the nut and saddle and you may have to limit yourself to a small range of different tunnings.

apollonio citterns i've seen are usually a long scale, which is also better suited for counter melody and song accompanyment than lead tune playing. big streaches. however donal lunny played a long scale for years and made it sing!

good luck and let us know how it goes