quark 125b

i only askesd as i will have my esc before my heatsink will arive and i will want to use it lol so do you think i should run it untill i think it is too hot and then give it a rest to cool down?????? i wont be running long as i only have rubish 3300 oam cells so about 10 min run times so do you recon it will be fine for little while ?????????
thanks for your guys help so far it has been great