Any other 737 fuel planners?

Hi,I have the v1.5 of the fuel planner by Milan Puta but the max TOW is wrong I think. I was planning a route from EGSS-EFHK which is about 1000nm and wanted to load 166 pax and 5000kg of cargo/bags. When I put that in the PMDG load edit it says the max TOW of the 738 is 78,636kg but on the fuel planner it says my TOW was about 70,000kg with the about mentioned loads but it says it was out of range. Which is right on the max TOW the load edit or the fuel planner? Is there a fuel planner thats better and works ok?Thanks.Andy S