Now get yourself some BS rated lever locks from UK. If you pick up some curtained lever locks it will give you a greater challenge for sure. These are generally single throw and have a curtain to help prevent you from using tools to access the levers for picking. Make sure you get a few keys if you buy one as you can make a turning tool with one of the keys and a pick tool from some small diameter piano wire. This should keep you busy for a while. IiRC a good starting curtained lever lock would be an ERA Profit (again IIRC). Your best bet is to try and get a look at the keys and stay away from locks with low cuts on the keys as low levers are tough to deal with even with your newly made tools which actually work very well. The downfall of these tools is that you need to have a pair of them if you use them for actual locksmith opening as different handing will require a tool that is a mirror image of the first tool you made.
If you happen to pick up a curtained lever lock, drop me a pm and I'll help you make a set of tools if it is not already posted on the site somewhere.