I am thinking about purchasing a Kubota L3240 with a BH90 Backhoe. The salesperson is trying to get me to select the Bh75A, because he says the weight of the BH90 could be too much for this tractor. I would appreciate the opinion of someone who has been using a L3240 with a BH90 backhoe. Do you feel that the extra weight has caused any problems when traveling, going up or down hills or with the tractor when operating the backhoe. I would also like to have liquid weight placed in the tires, will this stabilize the tractor. Should I just step up to a 3940.