Frequently Asked Questions about H0 Gauge How do I install the 74490/ 74491 turnout mechanism? - Technical tip 401 You will find and extensive explanation of the individual installation steps in our technical [...] here as a download (file size 16 MB). Track Plan Brochure What must I keep in mind when using the 74491, 74492, or 75491 turnout mechanisms? - Technical tip 404 Many factors influence the operation of these...