Aluminum Arrow Spine for Wifes Bow

[cedar_flingr]

My wife has been learning to shoot a recurve, shes been shooting a old shakespear that I have, shes pulling about 43lbs. @ 27".

Shes been shooting some old cedar arrows Ive had, but shes broke the majority of them, I need to get some new arrows for a 3-D shoot this week end,

Any suggestions on size of Aluminum arrows she should be shooting with this setup, as I dont have enough time to build cedars before this weekend?

Thanks for any help,

[LCB]

I would think a 1916's in alum or 35/55 in carbon.