At least one kit pairs this 6.5" aluminum woofer with the Seas H883 aluminum tweeter.  And I've also tried it with the Vifa D25 aluminum tweeter.  The result has always been a somewhat bright or edgy sound that, IMHO, grows irritating over time, particularly on classical program material with massed strings.  After many, many crossover attempts, I finally gave up.  The L17 woofer requires a very steep roll-off (and maybe a trap circuit) to deal with its intense breakup modes, and the aluminum tweeters I have tried can't meet a similarly steep high pass slope without sounding harsh.  If you don't require the hi-tech look of an all-aluminum design, this woofer really works much better with the Excel T25 Sonex dome tweeter.  The crossover point is 2100 Hz.  With one exception, the resistors in line with inductors are not really separate components -- they're just the suggested dcr value for the inductor.  The exception is the 4 Ohm resistor 1041 in the low pass, which is part of the trap circuit for the woofer.  Finally, be sure to notice that the tweeter is connected in reverse phase!

The crossover was designed with the drivers mounted in the Parts Express .55 cu ft cabinet, with the same driver placement as used in the DIY2000 crossover competition cabinet.  Box tuning is up to you -- a 6" by 2" port works pretty well.