Llyn padarn, which bit, will mention to some divers !
I am amazed of how much "air" people build into model boats !
I tend to fill the air spaces with foam which is light and will displace any water that may make its way into a model boat.
The percasa us quite long and take quite a bit of space in the loft, it's home for about 20 years but will "come down" into my model room this winter.
As said heavy boats are going to be a problem so I will be "converting" them into paper to help fund my hobby.
The percasa is the only if powered boat of interest really and will require some more thought and research before committing funds into it.
I need a pull start engine, preferably a 4 stroke, petrol, so no body can moan I am polluting the lake, which is odd really as the now full and methane producing ( producing electricity ) old tip some 150 feet above and 1/4 mile away, has water run off which will find its way into the lake. The pit was not lined !
The brown lake in another part of the quarry has been seen "bubbling" even in the winter, so something is going on in there !
Llanberis quarries may still contain "taban" bombs !
Anyways, stay safe out there...