Yamaha DTXpress/DTXplorer/DTXtreme

I know this isn't the first post on the issue and I kinda wish I had 
read about it earlier... I've just had the DTXpress II for two days 
and today at 8 pm there was a series of knocks (or thumps rather) 
from downstairs. Presumably because of the bass pedal vibrations :(. 
The floors are concrete with just a thin plastic carpeting. 

Tomorrow I guess I'll have to go and apologise and tell them/him/her 
that I'll put the whole set on a foam pad (with plywood on top to 
stabilise the set) which should dampen the vibrations and that I'll 
also change to lighter sticks. I can also agree to stop playing at 8 
pm, if necessary. I live in a student apartment block so as the 
neighbor(s) are roughly my age they SHOULD understand. 

-Antti