Axiom queries involving Powerups

I am trying to do a query for an Item that checks the value of an  
attribute which belongs it's powerup.

Sorry about not generalising the example... but in the snippet that  
follows straight out of my code:
	Lead is an Item subclass, and so is "self", which an an object  
instance (also an Item) doing the querying in one of it's methods
	IRecyclable is the powerup interface, and Lead installs it on in  
it's __init__ method. It only has one boolean attribute "inRecycleBin".

I tried this:
        list(self.store.query(Lead,AND(Lead.pipeline == self,  
IRecyclable(Lead).inRecycleBin == False)))

which gives me an error:
           File "/Library/Frameworks/Python.framework/Versions/2.4/ 
lib/python2.4/site-packages/zope/interface/interface.py", line 682,  
in __call__
             raise TypeError("Could not adapt", obj, self)
         exceptions.TypeError: ('Could not adapt', <class  
'salespipeline.model.Lead'>, <InterfaceClass  
salespipeline.model.IRecyclable>)

I suppose it's expecting an instance, not the class? Is there anyway  
to do this kind of query?

I found a workaround however... this works;
        [l for l in list(self.store.query(Lead,Lead.pipeline ==  
self)) if IRecyclable(l).inRecycleBin == False]

But I'm not sure if this is a good way of going about it. I was  
wondering if I'm doing something obviously wrong here?

Thanks!

Robert