Power supply question

[spameister]

I need some help with a question about my power supply. There are 5 different outputs on a Dunlop DC Brick type thing. It currently can supply 5 pedals and is rated at 450mA. I would like to know if it would be ok if I added a daisy chain of 3 or 5 more plugs (i.e in the style of a Godlyke type supply) to one of the outputs. I appreciate that i could not add too many otherwise the thing proably wouldnt work, but I need to power some more pedals as I have some on the way.

Failing this i might just buy a Boss TU-2 and use it to power some other pedals. I presume if I used my current power supply to power a TU-2 and then daisy chained out of the TU-2 it would be ok?

Thanks in advance.