Merging Cloth and Softbody Obi error

[fluidman84]

I am attempting to introduce the ObiSoftbody components into a project that contains Obi Cloth. I've updated both packages to the current (6.0.1) versions, but for some reason still receiving an error.  

Code:

Assets\Obi\Scripts\Softbody\Actors\ObiSoftbody.cs(27,30): error CS0115: 'ObiSoftbody.surfaceCollisions': no suitable method found to override

I've updated the ObiActor script in Obi\Scripts\Common\Actors as I thought that contains surfaceCollisions, but I still receive the error. Any suggestions?