collecting water off a green house

My 6x8 greenhouse has two small gutters on each side.
The water by default just pours off the ends of the gutters.
For some while I have considered collecting it.
I looked at the commercial end caps systems, far too expensive for me.

Here is what I did.
In the DIY stores you can buy 2cm white plastic water pipe.
You can also buy elbows and tee connectors.
It's all quite cheap.

I took a soft drinks can an cut out two small squares with some scissors.
Then block one end off the gutters with them using some bathroom sealant, the ends at the greenhouse door end.

I took a short length of the white pipe, about 4 cm and inserted into an elbow so about 2 cm stuck out.
The stuck out bit just nestles nicely in the gutter so I fixed it with some more bathroom sealant.
You could cut a small slit in the tube with a hacksaw and it would then slide onto the gutter for a better fit. Bathroom sealant of course.
Now I had an elbow on each gutter at the end opposite the greenhouse door.

So with a long length of pipe and a tee piece in the middle I connected the two elbows together.
A bit of pipe from the tee piece into a water butt and bingo it works.

Any help to anyone ?
Jimmy