lots of DIY weight boxes for 3pt hitchon the forum.
google search for...
diy ballast 3pt site:tractorbynet.com
then click up on images. and it should bring back a good amount of results.
the ""site:"" only brings back just stuff from this site, vs searching everything on internet
most folks tend to build a 3pt hitch "something" and fill with concrete. many time folks will use 1" to 4" pvc pipe in there weight box / ballast box so they can shove some long handle tools into the ballast box (shovels and like) or lower chain into the pipe, and toss hooks on the edge.
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pay attention to your "owners manual / operators manual" it should give you some info...
tire pressure for front wheels, and tire pressure for rear wheels.
with FEL, generally folks go up towards max pressure in the front tires, when they know they are planning to use the FEL.
with rear tires, myself and others will let the pressure down in them. or less going to be loading up a heavy 3pt attachment and then pressure gets raises in rear tires as well if needed.
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gauge wheels to a pipe that has a slit cut into it and tossed onto cutting edge. been used for FEL cutting edge, to rear blade cutting edge. to deal with not scraping up concrete driveways to paved driveways. to dealing with rock drive ways. there are some that have little flat "discs" think of them as skies, vs gauge wheels or a pipe.
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a 3pt hitch rear blade can be a nice rear weight. and dealing with snow at same time. more so when it comes to doing cleanup of removing snow with FEL, and wanting to remove some of the extra snow here and there that is compacted and slick in some areas. rear blade doubles duty when dealing with maintaining rock driveway and bring rock back up on the driveway in spring,summer, fall.