diff --git a/lasp/c/lasp_fft.c b/lasp/c/lasp_fft.c
index f238083..46eeec5 100644
--- a/lasp/c/lasp_fft.c
+++ b/lasp/c/lasp_fft.c
@@ -28,7 +28,7 @@ typedef struct Fft_s {
     d* real_storage;
 } Fft_s;
 #else
-#error "Cannot compile lasp_ffc.c, no FFT backend specified"
+#error "Cannot compile lasp_ffc.c, no FFT backend specified. Should either be FFTPack, or FFTW"
 #endif
 
 void load_fft_wisdom(const char* wisdom) {
@@ -130,7 +130,7 @@ void Fft_ifft_single(const Fft* fft,const vc* freqdata,vd* result) {
             getvdval(&fft->fft_work,0));
 
 
-#elif defined LASP_FFT_BACKEND_FFTW
+#elif LASP_FFT_BACKEND == FFTW
     c* freqdata_ptr = (c*) getvcval(freqdata,0);
 
     c_copy(fft->complex_storage, freqdata_ptr,nfft/2+1);
@@ -219,7 +219,7 @@ void Fft_fft_single(const Fft* fft,const vd* timedata,vc* result) {
         result_ptr[nfft+1] = 0;
     }
     check_overflow_vx(fft->fft_work);
-#elif defined LASP_FFT_BACKEND_FFTW
+#elif LASP_FFT_BACKEND == FFTW
 
     d* timedata_ptr = getvdval(timedata,0);
     c* result_ptr = getvcval(result,0);
diff --git a/lasp/c/lasp_mq.c b/lasp/c/lasp_mq.c
index 8e96130..b5031f9 100644
--- a/lasp/c/lasp_mq.c
+++ b/lasp/c/lasp_mq.c
@@ -96,10 +96,10 @@ void print_job_queue(JobQueue* jq) {
 
 JobQueue* JobQueue_alloc(const us max_jobs) {
   TRACE(15,"JobQueue_alloc");
-  if(max_jobs > LASP_MAX_NUM_CHANNELS) {
-    WARN("Max jobs restricted to LASP_MAX_NUM_CHANNELS");
-    return NULL;
-  }
+  /* if(max_jobs > LASP_MAX_NUM_CHANNELS) { */
+  /*   WARN("Max jobs restricted to LASP_MAX_NUM_CHANNELS"); */
+  /*   return NULL; */
+  /* } */
   JobQueue* jq = a_malloc(sizeof(JobQueue));
 
 
diff --git a/lasp/wrappers.pyx b/lasp/wrappers.pyx
index f7620c8..444bf49 100644
--- a/lasp/wrappers.pyx
+++ b/lasp/wrappers.pyx
@@ -449,7 +449,7 @@ cdef class SosFilterBank:
 
         """
         if sos.shape[0] != self.nsections:
-            raise RuntimeError('Invalid number of sections in filter data, should be {self.nsections.}')
+            raise RuntimeError(f'Invalid number of sections in filter data, should be {self.nsections}.')
         elif sos.shape[1] != 6:
             raise RuntimeError('Illegal number of filter coefficients in section. Should be 6.')
         cdef dmat coefs = dmat_foreign_data(sos.size,1,