So I'm building up a fixed-commuter bike and want to run a front brake. The fork is a round-bladed lugged steel track fork and is un-drilled. A front drum brake, like the Sturmey-Arched X-FD seems like a nice, cost-effective, and viable option. Im wondering if anyone here has any experience with such a setup, and in particular can speak to the following two concerns/questions:
1) Given that the forks were not designed for a drum brake, what (if any) are the negative consequences of running a drum brake? For example, will the forks flex undesirably during breaking? Could this potentially damage or break the forks?
2) What kind of lever is ideal for drum breaks? I want to run Avid Ultimates, but am concerned that these are designed for linear-pull and canti breaks, and so may not work optimally with other systems. Road levers are designed to exert high tension over short travel, while linear pull levers like the Avids are meant for mid/low tension and long travel. I'm just not sure where drum brakes fit into this rubric...
Any other issues for those of you who run drum brakes?