I see two options to fix

1. make a new blocklogdttfc which doesn't have a differing hardness
2. get the placed property saved with the extended property, have to create new blockbranch

java.lang.IllegalArgumentException: Cannot get property PropertyBool{name=placed, clazz=class java.lang.Boolean, values=[true, false]} as it does not exist in ExtendedBlockState{block=dynamictreestfc:block/branch/douglas_fir, properties=[radius]}
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getValue(BlockStateContainer.java:204)
at net.dries007.tfc.objects.blocks.wood.BlockLogTFC.getBlockHardness(BlockLogTFC.java:104)
at com.ferreusveritas.dynamictrees.blocks.BlockBranchBasic.getBlockHardness(BlockBranchBasic.java:180)
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getBlockHardness(BlockStateContainer.java:415)
at net.minecraftforge.common.ForgeHooks.blockStrength(ForgeHooks.java:252)
at net.minecraft.block.Block.getPlayerRelativeBlockHardness(Block.java:774)
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getPlayerRelativeBlockHardness(BlockStateContainer.java:420)
at net.minecraft.client.multiplayer.PlayerControllerMP.clickBlock(PlayerControllerMP.java:269)
at net.minecraft.client.Minecraft.clickMouse(Minecraft.java:1630)
at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:2376)
at net.minecraft.client.Minecraft.runTickKeyboard(Minecraft.java:2147)
at net.minecraft.client.Minecraft.runTick(Minecraft.java:1935)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1188)
at net.minecraft.client.Minecraft.run(Minecraft.java:442)
at net.minecraft.client.main.Main.main(Main.java:118)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
at GradleStart.main(GradleStart.java:25)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Client thread
Stacktrace:
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getValue(BlockStateContainer.java:204)
at net.dries007.tfc.objects.blocks.wood.BlockLogTFC.getBlockHardness(BlockLogTFC.java:104)
at com.ferreusveritas.dynamictrees.blocks.BlockBranchBasic.getBlockHardness(BlockBranchBasic.java:180)
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getBlockHardness(BlockStateContainer.java:415)
at net.minecraftforge.common.ForgeHooks.blockStrength(ForgeHooks.java:252)
at net.minecraft.block.Block.getPlayerRelativeBlockHardness(Block.java:774)
at net.minecraft.block.state.BlockStateContainer$StateImplementation.getPlayerRelativeBlockHardness(BlockStateContainer.java:420)
at net.minecraft.client.multiplayer.PlayerControllerMP.clickBlock(PlayerControllerMP.java:269)
at net.minecraft.client.Minecraft.clickMouse(Minecraft.java:1630)
at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:2376)
at net.minecraft.client.Minecraft.runTickKeyboard(Minecraft.java:2147)

Fixed via not setting the DT primitiveLog to a BlockLogTFC. Unfortunately, this creates a new issue.