Now I don't know if they are members or pay us a visit now and again, but I would just like make a suggestion to you.
I have seen a few posts were varistreams are being cooked, by one fault or another, ie, faults with split charge relays, but the main one being connecting the battery terminals to the wrong polarity.
Now its about time williamsons got there act together, we know there are a few of us on here, who don't take care first thing in the morning, when connecting our batteries or changing them,and we connect them the wrong way, but don't take the p**s out the guy's Williamsons.
Get your manufacturers to fit an onboard Diode, just incase your unsure what I mean let me explain, a Diode will allow voltage to travel in one direction only, and if one of the guy's connects his battery the wrong way, this little 10p Diode, will stop him blowing his varistream, and it will also save him the loss of a minimum days pay and another £75 for a replacement, and all for a little 10p .Diode
Come on Williamsons get your act together, your going to be left behind in the market if you don't.
From one member with a working Varistream, on behalf of other members who may not be so fortunate.