[ponch]

The upgrade is directly connected with the year of trailer that you have.

If you have round hydraulics jacks then there is no problem if they are square, as mine were , or are crank down, then there is an additional charge for the jacks in back.

Stage one works just fine IF used properly, period. I never had one time that I had a problem and neither have most others. There has to be a miscommunication in the use of the product.

I switched just because I wanted to upgrade as I will with sys 4.