If you get an error about duplicate nodes on startup, and your simple research benches don't connect to the Medieval Overhaul bookshelves that are supposed to provide a research speed boost, this is why.

(this mod's folder)/1.3/Patches/Add_AffectedByFacilities_SimpleResearchBench.xml doesn't check to see if the xml nodes it's adding already exist from other mods. This is all the same code, just in stages and inside a couple checks so it only adds the lines it actually needs to.

<?xml version="1.0" encoding="utf-8"?>
<Patch>
<Operation Class="PatchOperationConditional">
<xpath>/Defs/ThingDef[defName="SimpleResearchBench"]/comps</xpath>
<match Class="PatchOperationConditional">
<xpath>/Defs/ThingDef[defName="SimpleResearchBench"]/comps/li[@Class="CompProperties_AffectedByFacilities"]</xpath>
<match Class="PatchOperationAdd">
<xpath>/Defs/ThingDef[defName="SimpleResearchBench"]/comps/li[@Class="CompProperties_AffectedByFacilities"]/linkableFacilities</xpath>
<value>
<li>DankPyon_RusticBookshelf</li>
</value>
</match>
<nomatch Class="PatchOperationAdd">
<xpath>/Defs/ThingDef[defName="SimpleResearchBench"]/comps</xpath>
<value>
<li Class="CompProperties_AffectedByFacilities">
<linkableFacilities>
<li>DankPyon_RusticBookshelf</li>
</linkableFacilities>
</li>
</value>
</nomatch>
</match>
<nomatch Class="PatchOperationAdd">
<xpath>/Defs/ThingDef[defName="SimpleResearchBench"]</xpath>
<value>
<comps>
<li Class="CompProperties_AffectedByFacilities">
<linkableFacilities>
<li>DankPyon_RusticBookshelf</li>
</linkableFacilities>
</li>
</comps>
</value>
</nomatch>
</Operation>
</Patch>