Eton 3-way MTM OB

[Draki]

Hi all

Looking for opinions/suggestions before starting the actual building of the enclosures.
The planned system, I have the drivers already:
11-581 bass enclosure: 65L BR, but would like to hear any comments if this driver can be used in a closed enclosure? The closed system will be preferable. I came up with 29/30 L but somehow looks too small?

7-375 (2 pcs) with ER4, MTM configuration in a OB baffle (with U-wings, some damping at the back to deal with the back energy). X/O point to the bass @ 90-120 Hz (active, DCX2496). The MTM XO will start as passive and eventually will be duplicated on the DCX for a fully active 3-Way.

Any shortcomings I am not aware of?

Thanks.
Draki