yes the koopmans are janssen based pigeons they have a blend of dirk van dyke and van loon which are to an extent janssen based birds like all, marijke vink does fly on here own and is very very succesfull at it, she sold up in 2005 and she is back racing with very good results already, i would give her another 2 years and she will be back to were she left off, as for the son of tips i dont no how micks one is breeding bt i do no were there is 1 that is young and breeding winners