Visaton BGS40 / MA Alpair 10 open baffle...help desired

[jmillerdoc]

Hello,
Not sure if this is the best place for this question.....
I have a pair of the Visaton BGS40 15" woofers as used in the Visaton NoBox BB open baffle project. Instead of using the B200 as used in the original design I have a pair of MA Alpair 10's I would like to use. I am still a beginner at crossover design and wanted some assistance with designing the XO for this project. My intentions are to build the baffles the same as in The original design but to sub the Alpairs for the B200's.
Anyone willing to assist in helping me design the XO I would be greatly appreciative.

Here's the original project:
The VISATON NoBox BB Loudspeaker Kit Review By Dick Olsher
Thanks in advance!
Jeff