Here are Mike McCarville's excellent videos on building many of our HO scale kits.
HO Wagons===============================
#2112 Hearse Wagon
#2111 Carts In 2 Pack
#2110 Photography Wagon
#2106 Log Wagon
#2109 Paddy Wagon
#2107 Watkins Delivery Wagon
#2102 Heinz Delivery Wagon
#2108 Buggy
#2101 Ore Wagon
#2105 Water/Sprinkler Wagon
#2103 Buckboard
#2104 Stake Wagon
#2100 Farm Wagon
HO Structures:
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#2036 Barber Shop
#2020 The King Mine
#2034 Saloon
#2032 Haberdashery
#2007 Silverton Tool Shed, first half of 2 shed kit
#2007 Silverton Coal Shed, second half of 2 shed kit
#2030 Apothecary False Front
#2011 Red Mountain Jail
#2000-2 Aerial Tram Towers
Tram Buckets
#2012 Silverton Jail
#2013 Animas Forks Jail
#2016 Small Ore Bin (Truck Ramp)
#2015 Small Ore Bin (Mine Track)
#2014 Outhouse #1
#2200 18' HOn3 Ore Cars