Pippin88 and Dan911 thanks for your input. There are lots of intelligent people on this forum and I value your thoughts, advice and suggestions.
Ref keeping the pour area wide enough to keep the meniscus out of the way is good advice. Its unavoidable on the inside edge as it definitely will interrupt the plane for the cross members. But this isnt as critical as the outsides that will support the linear bearing and on the outsides it will be out of the way.
I emailed Mike at precision Epoxy today to get a status on the epoxy and it has shipped. Hopefully I'll get it before Friday afternoon. I'm off all week and I was hoping it would be here so I could make some progress as this is starting to be a hold up. Oh well...
I made some progress on the dam tonight. Pics follow...