I have a 2510 with hardtop. Last spring I mounted a Raymarine 48'' open array 72 mile radar on top. I was a bit apprehensive at first due to the shear weight of the thing. However, I did not choose it , it chose me. I got it new in box for $65. I was in the right place, and it was all legal. I found a used head unit at Martek for $300, and had to buy new cord for $225. Anyhow, I mounted it flush to the top and it works great! I can pick up single birds!!!! I know it is overkill, but I couldn't turn it down. I do have it mounted directly straddling a crossmember but I am still concerned about its weight and a hard sea. I have been visiting this site for a year now and have not introduced myself or added any pictures yet. I will try to take some tomorrow of the radar to upload.