Mine is also leaking, what differences did you find between S14 and S15 condenser drawings?
Visually they look the same but have different part numbers.
I could not find the drawings on HPI site, a link would be much appreciated.
I am trying hard to find a new replacement but seems impossible.
S14 looks different to S14a and S15
Visually the only difference I can see between S14a and S15 is S14a has bolt on feet, S15 weld on.