Walthers HO Cornerstone 2901 3-Stall Modern Roundhouse Addition - Kit - 16 x 20-1/8 x 5-1/2" 40.6 x 51.1 x 14cm RECSES_2026-6-16_CUR_1042 1 Medium rooftop air conditioner

1 Medium rooftop air conditioner

Medium offset couplers with short gearboxes

eight control lines for local turnout control and eight occupancy sensor inputs

Performing everything from painting to complete rebuilds

Walthers HO Cornerstone 2901 3-Stall Modern Roundhouse Addition - Kit - 16 x 20-1/8 x 5-1/2" 40.6 x 51.1 x 14cm RECSES_2026-6-16_CUR_1042 1 Medium rooftop air conditionerThe Walthers Cornerstone 3 Stall Modern Roundhouse Addition enlarges the hallmark of steam era railroading on your HO layout the 3 Stall Modern Roundhouse. If you model the diesel era you'll also find this kit to be a centerpiece of your servicing facility since some of these classics are still used today for servicing diesels. No matter the weather, workers could easily inspect and service locos under cover. Size was based on the number of engines