modifications

Hi All I will have some ready cash soon, and am thinking about taking on the "detectormods" to give my Minelab 4500 a boost and bit of extra in the hunt for gold. Question is, has anyone had this done to their machine and was it worth the cost, as it's not cheap but then again, gold would pay...

So, I wanted to look at the use of the 3.7V Li-On batteries and a cheap interface. (found that some are selling the mod at over $100. MATERIALS - https://www.bunnings.com.au/garden-rain-300-x-25mm-poly-riser-connector_p4816126 @ $3.75...

has anyone here paid to have modifications carried out to their detectors and what do you think of the outcome ? Detectormods.com advertise that service on ebay and state they can quieten down distortion to give clearer / deeper signals , they dont come cheap at $ 750 - 1500 each for SD and GP...