For what it's worth. I don't have my grand yet - but I do have the Piano Book with me. He mentions double striking as a problem with certain return springs made of nylon cord - which is not a problem in your Seiler, according to his description. Since your piano is very new to your living room, he does mention that moving can cause several ill effects. The most common is tuning, of course, which you will discover on your own. He mentions that if the key stop rail is not fastened tightly before moving, the keys and associated actions can be tweeked and be just annoying or actually become unplayable after moving. This can be readjusted by a technician. Also he suggests that if there is a large difference in humidity between the original location and your living room that it could take a few days to a few weeks for the porous parts to adjust to the new humidity. I have not found any mention of the hammer staying up problem, but I'll keep looking.