At CERN three test chambers (P2) with 8 layers and 11.5 mm cell diameter with a size of about m are available for tests. Initial small prototype chambers with the chosen plane configuration may be obtained from NIKHEF from the material used for the honeycomb chambers, which were recently constructed for CHORUS. For the beam either an empty space between honeycomb modules (see figure 3.2) or a dead chamber region is needed. A prototype study for dead beam regions and for U and V coordinate readout is considered. Full size chambers will be tested during the construction phase.