Wish I had the talent to do that. They sell very similar shooting houses around here for several hundred dollars. More than I'm willing to pay.
Here's some stuff...
1.) Maybe add some glue or extra nails/screws on the flooring to prevent squeaks.
2.) Right chair height makes shots steadier instead of raising or stooping while shooting.
3.) Get a shooting bag to rest over windowsill edge to steady the rest.
4.) Hanging cloth material inside helps prevent/lower sound echoes. (line walls)
5.) Might add some graphite to areas where windows slide to make quieter/easier.
Might be a good time to get the kids out and let them do some .22 shooting as well. That way they can have fun, build confidence and learn what it will be like come huntin' season! You'll also work out some bugs before hand, instead of on opener when that huge 12 pointer is out there. LOL!
Thanks for the post. Fun to look at! Good luck this season.
iSnipe