Pickup for flat top acoustic mandolin

[DanSmi]

Hi all,
I have been experimenting fitting a pickup to my flat-top mandolin. I bought a Cherub pickup that clips into the oval sound hole but don't get much sound from it.
I added a LR Baggs Gigpro pre-amp and find that the sound is very variable in volume,
Please can you suggest how I should position the pickup? should it be under the strings or beneath the E strings?
Are there better alternatives? I was considering the Fishman bridge pickups, but only the more expensive ones are suitable for a flat-top.
thanks for your suggestions.
dan

[mandroid]

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