Hello all, posting again after working overseas for a bit. Hope you are all well etc. First of all thank you for taking time to read this, it may be slightly long winded.

I made my split mould for a large diameter tube. The mould is 300mm id x 400 od x 1500mm long. So far I have attempted to bag the layup, sealing on the on the inner mould surface. Of course this was useless because of the splits.
The next attempt was to envelope bag, I couldn't get a vacuum probably due to the bag piercing on the mould exterior.
So the next thing I was going to try was breather clothing the exterior and envelope bagging, until it dawned on me that the resin is going to migrate through the splits into the breather and make a right old mess.
So what are my options? I have considered silicon sealing the splits on the exterior and proceeding with the envelope in an attempt to stem the flow of resin into the breather. Or I could perhaps resin up the exterior and attempt to seal the bag on the interior again, basically seal the splits and treat it as a large panel type bagging.
Any thoughts on the best option going forward in an attempt to get this part complete. The second option is preferred as it will simplify bagging greatly (this is heavy and enveloping is difficult). I realise there is probably no right or wrong answer as such, however any input from you experienced moulders would be greatly appreciated. Pictures to follow:

Thanks again for the valuable info Hanaldo. I will be using EC IN2 resin with 100% slow catalyst.
UPDATE: I have enveloped the tube and the results are promising:


The spiral and connector are off the laminate, could have done with a bit more mesh but looks ok.
Vacuum drop test:


After 30 minutes:


However I have clamped off the hose and get the same result, so the leak is at the catch pot / vacuum pump. In fact when I undid the clamp, the vacuum increased, so I think the envelope is good.
I just need to find the leak in the catch pot / vacuum pump and fingers crossed will be ready to infuse. I only did the gland on the catch pot hand tight, do these normally need a spannering? The 8mm id hose doesn't seem like a particulary tight fit on the barb connectors, i might trim the ends back a bit.