A place for bowthrusters? Most definitely, and my advice would be somewhere near the bow!.....No, they're quite definitely not cheating. It's the skipper's responsibility to handle his boat in a safe and controlled manner, especially in the vicinity of other craft, using any and all methods available. We've all had those embarassing moments when our craft (small, medium or large) has taken over control, aided and abetted by currents, wind, eddies, the sudden approach of another vessel. Best prevented, say I, and if a bowthruster helps manoeverability, then you would be daft not to have one. I had mine installed professionally, and I'm not sure I'd advise a DIY approach unless your fibre-glassing technique is 100% trustworthy. It involves two rather large holes in your hull, and the sea will surely find a way in if the job hasn't been done properly. As to size, well, take the professional's advice, based in displacement rather than length. On my F34 there is a lot of solidified ballast in the bow and the thruster tunnel is perhaps not quite as deep in the water as is ideal - the F37 may be the same. As to power - some say run gert great leads from the main battery, while others advise a separate battery in the bows. Enjoy your new-found manoeverability!