I assume you mean to be PIC current, and then above is correct. You need to do a 61.58 check every 12 months in an aircraft which requires more than 1 crew member, but only every 24 months in each specific aircraft. If you are type rated in 2 separate aircraft requiring a different type rating each, you can rotate the checks - this year one type, next year the other one - which keeps you 24 month current on each as well.
If however you are only rated in the F900, or are not attending recurrent training for any other aircraft, you need recurrent training each 12 months on the F900.
If with regards to instrument currency you are referring to the 6 month/6 approaches/ holds/interecpts/ tracking to be 61.57(c) current, that is only by aircraft "category", which is "airplane". You could do those in a Cessna 152 or a simulator which representative of a Cessna 152 and that would get your instrument currency requirements done.
Hope that helps.