well, my friends, it was difficult to sell the 521 but I'm glad I saved to be overlooked rotting somewhere . Moreover , had no garage for storage , while also turned out to be a good deal. All together weighed in the decision ... What is the value in the US of a 521 ? I'll put some pictures of past work done thereon, in particular steering wheel shift for RAID and placing the bottom of the wooden cargo box , which I honestly think that was very nice! Now , in time , start working in 710 SW that my dad bought new in Canada!