Fender Acoustic Pickup Cypress

I wanted to fit this to my rather ancient steel strung 'O' size guitar and this pickup (according to Fender) is one of the few all in one types that will go into its diminutive sound-hole which it does - unfortunately not with the clamping screws in place! Anyway its a very old cheap guitar so a couple of slots filed and in in went. Sound is great but for the 1st string which was way quieter than all the others - I use 9 to 42's. Tried it on a friends more modern acoustic with a (much) lower action and heaver strings and it was far better balanced. Certainly looks good in place, the captive lead is a bit annoying when playing and quite long to bundle up when not in use as the pick-up is not a quick fit/removal. If I was going to use this long-term I'd probably cut the lead and solder it to a body mounted socket. So not suitable for my old acoustic - then again it cost more than the acoustic is probably worth, so I'll put it to one side as I'm on the look out for a replacement acoustic anyway.